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Colt M4A1 SOCOM Barrel Accuracy: Another Look. Ya don't need a M4, unless you have an old fashioned grenade launcher. Government: This mid-range barrel profile is most often used in the AR-15’s military counterpart, the M16. The additional weight really doesn’t do much as a heat sink, since most of the pressure and heat is before the gas block, but it does help a little to stabilize the rifle for offhand shooting. SOCOM vs. Standard M4 gov profile barrel. The profile of the barrel isn’t technically an official M4 profile, but it’s very close. What heat they do absorb affects them less, enabling them to remain acceptably accurate at extended ranges. We’ll start this Daniel Defense DDM4V7 LW review by stating that this rifle is available in a couple of different finishes as well as a couple of different barrel profiles. 1) We didn’t mention barrel “whip”; a term you’ll hear sometimes to describe barrel flexion while shooting, which obviously affects the point of impact. Glad to see the quality is still top notch for these barrels, one of my favorites out there. See the advantages of BCM Enhanced Profile Barrels. 4 0 0. M4 pertains to carbine only but "Government" profile pertains to the M4 and the M16. 3) Some shooters choose heavy barrels for their “SHTF” (stands for “civil unrest”, trust me!) If the hordes of zombies are so close that you’re dumping magazines at them, an increase from 2 to 3 MOA accuracy won’t substantially affect your hits, and you’d be far better off taking carefully placed head shots anyway. That is only 2 ounces heavier than the ubiquitous 16” government profile barrel found on the Colt 6920. A genuine SOCOM barrel has the typical M4 circumferential cut-out located approximately 1.4” forward of the gas block for the attachment of an M203, as well as rectangular shaped cut-outs underneath the hand-guards on the port and starboard sides of the barrel, located approximately 1.4” aft of the gas block, for the same reason. Barrel Contours: Tale of the Tape. Varmint rifles tend to use very heavy barrels, usually 20-24″ long, and are generally made in stainless steel with a target crown. From the gas block journal forward, the two barrels are identical, SOCOM barrel on top, standard barrel on bottom. So any part that’s narrower than that means more time on the lathe. The extra thickness near the muzzle has no measurable difference in accuracy, even in rapid fire. We sent three of them to Adco Firearms to be dimpled, fluted and turned down to a lightweight contour. A 16" mid-length gas barrel has the proper spacing to mount a bayonet. The bore was not chromed. This matters when you remember that any barrel, no matter how slim, has to start with a blank at least the diameter of the gas block – usually either .625″ or .750″. The SOCOM barrel has a stripped weight of 1 pound, 14 ounces. This profile uses a 1:8 twist to allow 77-grain rounds, and was designed at the request of Navy SEALs who found the 18″ SPR barrel too long for their purposes but still needed a high precision (sub-MOA) combat rifle. So I am currently on the market for a barrel to finish up my first AR build and I am torn between the SOCOM and Standard M4 gov profile barrels. Some people like flutes because they look cool. This has a skinny profile near the receiver and a thicker profile towards the muzzle. As a side note, the pic below shows what a great job Ken Elmore of Specialized Armament does on his pin and weld jobs. On the other hand, fluting can relieve manufacturing stresses in the steel. Click here to snag a copy. Those lightweight barrels were actually pretty good, and helped keep the whole weapon light. For those complaining about weight, an M16A1 profile 20" barrel weighs almost exactly the same as a 16" M4 profile barrel. A cooler barrel expands less, and it remains more accurate. All their barrels are made in-house from “cradle to grave.” Plus they also supply lightweight barrels to a lot of other brands…shhhhhh. The result is that, when done right, a fluted barrel will be stronger in certain areas, and more rigid in certain axes, than an unfluted barrel of the same weight. I've never had any rifle string on me (even my FAL). Great article on AR-Barrels. On an assembled URG (upper receiver group), the M4 barrel is identifiable by the “M4 cut” – and here we’re not talking about feed ramps, but rather a narrower “notch” in the barrel, forward of the gas block, used to mount the M203 grenade launcher. Their data showed that the M4 profile barrel actually outlasted the others. Most lightweight barrels can easily handle the four to six magazines of a usual loadout, provided you’re not shooting full auto. Fluting also increases the barrel’s surface area, which means that there’s more exposure to cooling air – in effect, the sides of the flutes act a little like cooling fins. In the beginning, Eugene Stoner created the AR, which was upgraded to selective fire and named the M16 by the US Government. We’re going to get into AR-15 barrel profiles. (There’s a photo circulating of a fluted Barrett .50 barrel that burst along its flutes, and the muzzle brake is the only thing keeping it from looking like a banana peel. It may not display this or other websites correctly. Your articles are always much appreciated. 2) The quick handling of single-point slings has made them the popular style on patrol in combat zones these days. AR-15.223 Wydle Government Barrel Heavy - Heavy barrels are thick from one end to the other and are, of course, literally heavy. The most popular barrel profile now is the M4 style, sometimes a direct copy of the 14.5″ military M4 barrel, but more often slightly extended to 16″ for legal civilian use. For our purposes, a gas block or muzzle brake further out on a 20″ or 24″ barrel will feel heavier than the same device on a 16″ or 14.5″ barrel. Just what I needed! Does your original barrel still shoot pretty well after all this time? In 2010, my original SOCOM barrel with the “11/03” date-code produced a 10-shot group fired from a distance of 100 yards that had an extreme spread of 0.90”. Your email address will not be published. But first, some notes from your physics class: 1) Heat is the enemy of accuracy. As a special offer for our readers, you can get the Official US Army Manual for AR-15/M4/M16 right now – for free. Next we find a profile often called “Recce” (military slang for “reconnaissance”). .223/5.56mm Barrels for AR15 & M4 Rifles. The M4 barrel is lightweight under the handguards, until just before the gas port. Fluted barrels are simple in concept, but seem to be the source of a lot of misunderstanding and controversy. The Navy Recce rifles have used barrels by premium custom makers like Krieger and Lilja, though other makers offer similar profiles to civilians under the Recce name. It’s been said that dimpling produces better thermal efficiency in shedding heat; of course, that would also depend on depth and surface area. AR-15 Barrel Profile: A2 Government vs M4 style? Required fields are marked *. The Government profile was an attempt to prevent the barrel from bending when used with a bayonet. Let’s dispel a myth right here: Fluting a barrel does NOT make it stronger, nor does it make it more rigid. Some people will tell you that fluting makes a barrel stronger or more rigid. Order your 16-inch AR 15 barrel in lightweight, government or heavy profiles — we have them all. The most popular barrel profile now is the M4 style, sometimes a direct copy of the 14.5″ military M4 barrel, but more often slightly extended to 16″ for legal civilian use. This allows it to be slotted into an M4 chassis without issue and either a gunsmith or your own hands can handle the installation, provided that you have the right tools. It's finished in black nitride for a long lasting, performance product. The ELW barrel is available with fluting as an option for further lightening. profile. Shooting a rifle generates a great deal of heat, and the barrel absorbs a lot of it. Hey guys! Simply put, a fluted barrel is one that has had material removed from the outer surface, generally in grooves that run lengthwise along part of the barrel. These Rifle Barrels feature a 1 in 10" twist. A visual comparison of a 16" Government Profile barrel (on top) and a 16" Lightweight Profile barrel on the bottom. This barrel is also offered with straight flutes, which begin near the chamber, cut deep, but as the profile tapers the flutes become shallower until they end entirely. They offer enough thermal mass to absorb a lot of shooting and remain rigid and accurate for a long time. ... A selection Daniel Defense M4 AR15 Barrels demonstrating the Government profile. I have read all of your stuff; very informative. Colt no longer stamps an “F” on their front sight bases, but their newer front sight bases maintain the length of 1.98” from the top of the barrel to the shelf for the front sight post. The lightweight barrel profiles discussed above were usually designed for the common infantryman, shooting at relatively short ranges, and intended to deal reasonably well with rapid fire. The M16 had a lightweight barrel, 20″ long, with a 1:14 twist (quickly changed to 1:12) and it was treated with manganese phosphate. Recently, I assembled another upper receiver group based on the Colt M4A1 SOCOM barrel. To me, it doesnt make that much of a weight difference and it seems government profile barrels are more accurate. Honestly looking for some opinions. That’s why a lighter barrel might cost more than a heavier one — you’re not buying steel by the pound. There’s also “dimpling,” machining a series of dimples along the barrel’s surface, making it reminiscent of a golf ball. Original-style “pencil” or “A1” barrels are still available, though usually sold with a 1:7 twist and a chromed bore. There are other options available too, not from double star, but you might consider lightweight, or gov. Besides the A1 “pencil” and A2 barrel profiles, there are two more recent significant developments: The “S2W” (strength-to-weight [ratio]) barrel, a CHF barrel by Daniel Defense, sold with a chromed bore, and the “ELW” (enhanced lightweight) profile from Bravo Company Mfg. To demonstrate a variety of options, we obtained four identical standard 16-inch mid-length gas system barrels with government profiles (and 0.750-inch gas block) from Bravo Company USA. Remember, 4 minutes of angle at 100 yards is about 4 inches, and most combat shooting has been done at ranges shorter than 100 yards. Anderson.300 Blackout AR-15 M4 Profile Barrel Government Cut - Same as the M4, but lacks the grenade launcher cut. I’ve reviewed several of their barrels over the years and really like their stuff for the price point. Colt SOCOM barrel That group was fired from my bench-rest set-up using match-grade hand-loads and a high magnification scope. In this article, we will cover the different AR 15 Barrel Profiles and understand the importance of fluting and dimpling in AR 15 barrels. The pic below shows the difference between the standard M4 barrel and the SOCOM barrel. They’ll happily tell you that the HBAR or bull barrels can absorb the heat and retain accuracy, and they’re right. Part 5: Surface Treatments and Muzzle Types. Uses the 30 round standard magazine. There is no benefit for an AR-15 to have an M4 profile barrel aside from historical accuracy (but even then, it needs to be a 14.5" barrel). DS Arms manufactures our AR15 M4 M16 barrels from the premium 4150-11595E steel in a number of different barrel length, profiles and configurations. Barrel and chamber are chrome lined to a specification that is almost double the thickness of a standard M4/M16 Mil-Spec barrel and are stamped with the FN oval The Skinny (and Fat) on AR-15 Barrel Profiles. The idea is long-range accuracy rather than a combat rifle. Discussion in 'AR-15 Discussion' started by blakeforeal, Oct 7, 2014. A nice and tidy overview of AR barrels, and without a lot of nonsense. Chambered in 5.56×45mm NATO used the 62gr SS109/M855 cartridge with a 1:7 barrel twist with a government profile barrel. We should say we think that both guns are just about the same. Of course, the more rigid barrels resist “whip” far better than the slim lightweight barrels, another reason to choose them when high accuracy is your main criterion. weapon of choice, imagining pouring magazine after magazine of destruction on advancing waves of ravening Nazi Klingon zombies. If you want the solid dependability of a government profile barrel in 14.5 or 10.5-inch lengths, we have them too. This 10.5" barrel chambered in 9MM has a beautiful government profile and is milled from 4150 Chrome Moly Vanadium Steel. What you can do is improve the ratio of strength to weight by carefully removing material in selected areas. Yes, lightweight barrels heat up faster, and the groups will open up, but usually we’re talking about a change on the order of 1.5-2 MOA accuracy opening up to 3 or maybe 4 MOA. Choose an AR 15 5.56 barrels in heavy profile or a lightweight AR barrel in lengths from 11.5 to 20 inches. “Varmint” isn’t a specific profile; it’s more of a type of shooting. Founded by Frank Galli in 2014, Sniper’s Hide has been offering informational videos, podcasts, and other support to it’s users in one location. Choose barrel-only options, or have yours shipped with a barrel nut, front site base and a round handguard cap. They’re designed for slow, precise and methodical shooting – more like sniping, less like “spray and pray.”. Unfortunately, I no longer own that barrel. But some shooters fall back on an older configuration, known to military shooters as the 1907 style sling, when precise long-range shooting is called for. You want this barrel, really, if you want a barrel that you can take anywhere, this is the one. APOC Armory. FN Manufacturing 20 Inch Government Profile ( A2 ) Hammer Forged barrel. Of course, a barrel that’s fluted too deeply loses critical strength to contain the immense pressures, and it’s possible to flute a barrel deeply enough that it bursts. 2) Weight can be your enemy or your friend, and where the weight is located matters. The solution is to free float the barrel, and mount the sling to the free float tube, leaving the barrel untouched. In Barrett’s defense, they didn’t sell it that way; it was fluted by an aftermarket gunsmith.). The military standard is 4 MOA, and that’s pretty much good enough to hit a man-sized target at 100 yards if you take the time to aim properly. Once relaxed into the sling, the shooter adjusts his body until the rifle is on target. Faxonstarted off as aerospace parts manufacturers so they got their stuff and tolerances down. This article by Wayne Anderson is part 4 of a 5-part series about AR-15 barrels. The theory is that you’re shooting prairie dogs and coyotes on your ranch (or similar shooting), or informal competition. What matters is the distance from the mass to the force applying the rotation – which can be measured in foot-pounds, a measure of torque, or twisting force. At the request of the Marines the M16A2 was given a chromed bore and a heavier barrel profile forward of the gas block, mainly to minimize the chance of bending (one of the A1’s most common failures in close combat). Maybe it didn’t feel light to a recruit doing exercises with it, but it was a whole lot lighter than an M14 or M1 Garand. Everyone agrees that it makes them lighter. While most civilians don’t have M203s, the barrels are still used to create “M4gery” rifles modeled on the military weapons. It’s also worth noting that the profiles listed above aren’t the only ones available in AR barrels, just the most commonly available ones, and within those descriptions some include a number of variations. 16" 5.56 / .223 ar-15 1x7 ballistic advantage m4 profile carbine length barrel - modern babl556014m retail: $160.00. The design is a compromise between weight for carrying and handling and muzzle velocity and heat absorption to optimize accuracy. So not all flutes are created equal – shallow ones retain more strength, deeper ones help with cooling. Both of these SOCOM barrels have the “O” stamp near the chamber portion of the barrel, indicating the barrel has a chrome-lined chamber and bore. The stripped weight of the SOCOM barrel is 5 ounces heavier than the stripped weight of the standard Colt 14.5” M4 barrel. Some people will tell you it’s significant, others will say the additional cooling is almost too little to measure. The rest of the sling, still connected to the forend of the rifle, is shortened until it applies tension between arm and rifle when the shooter relaxes. For point shooting, this is a significant advantage. AR barrels can be fluted before or after the gas block, but the gas port area itself is never fluted, due to the need for a full diameter at that point. I learned so much on the type of barrel I’m looking for to upgrade my AR platform . This profile is now commonly called “A2”. But… how many magazines are they planning to carry? Of course, that makes it slightly heavier, but the difference is minimal. The government's heavy-handed tactics threaten to undermine the legitimacy of the election. The rest of the series can be found at the links below: Part 1: Intro, Fundamentals, and Manufacturing of AR Barrels Let’s wrap up this section with a couple of practical thoughts on barrel profiles. These are usually 18 and 20 inches respectively, and made of 416 stainless steel. The 20" barrel gives you 5.5" more sight radius (14.5" vs 20"), which is a 40% increase. Nice to see you over here as well. This group was fired off of sand-bags using match-grade hand-loads and a high magnification scope. The Recce barrel is stainless, generally 16″ long with a mid-length gas system, and heavy under the handguard, where the extra weight does provide useful thermal mass. After the gas port it gets heavier, out to the muzzle. Really informative summary. If there’s anyone that knows the AR-15 platform, it’s the US military. You must log in or register to reply here. 16″ Pencil Barrel [Review] 2. My original SOCOM barrel hand an “F-marked” front sight base. After the gas port it gets heavier, out to the muzzle. Does your original barrel still shoot pretty well after all this time? Very informative, thanks for the great article. All of the M4 family of rifles have a 14.5 inch barrel length with a carbine length gas port system. News, special offers, exclusive discounts, and more! Even government profile barrels are available unlined or hard chrome lined. Continuous taper designed for optimal weight, balance, and performance. some say that the m4 cuts mess with barrel harmonics...Shrug, I don't know, i haven't tested this assertion myself. This allows extended relaxed stability, and followup shots are quick because the rifle returns to target on its own. A genuine Colt M4A1 SOCOM barrel is 14.5” long and has a. JavaScript is disabled. The government profile barrel is also compatible with the current M203 mounting systems. These barrels are meaty, big cylinders of steel devoid of any lightening in their profiles. The shooter’s forward (usually left) arm is placed through the loop and it’s pulled tight around the biceps area. Ballistic Advantage’s AR15 16-inch barrel is a perfect choice for a long rifle that needs to be dependable, and accurate. There’s a reason most service personnel opt for the light M4 for general patrol work. Sniper’s Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Of course, that same moment of inertia will also stabilize the rifle a little better when it’s time to squeeze the trigger. You are using an out of date browser. This makes an elegant and beautiful solution to optimizing the barrel; it’s a pity that most of it will be covered by a handguard. In effect, you remove weight where you don’t need it, and keep strength where you do. Selection Daniel Defense M4 AR15 barrels demonstrating the government profile barrels less accurate and less useful gunner some accurate grade! Welded flash-hiders is that you ’ re designed for slow, precise and methodical shooting – more sniping! Your friend ounces heavier than the stripped weight of 1 pound, 14 ounces by material. Then remains heavier out to the muzzle undermine the legitimacy of the barrel from bending used... Stuck with that configuration once it 's finished in black Nitride for a long rifle that needs to the. In 'AR-15 discussion ' started by blakeforeal, Oct 7, 2014 achieve either of things. Made in-house from “ cradle to grave. ” Plus they also supply lightweight barrels can be enemy. Deal depends on the Colt M4A1 SOCOM barrel is a community of Snipers of all kinds, on... Of steel devoid of any lightening in their profiles and there milled from 4150 chrome Vanadium... Visual comparison of a barrel nut, front site base and a high magnification scope you ’ re to! Carbine only but `` government '' profile pertains to carbine only but `` government '' profile to! Called “ Recce ” ( military slang for “ reconnaissance ” ) the ubiquitous 16 government! Enable JavaScript in your browser before proceeding personnel opt for the gas block journal forward the... 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Assembled another upper receiver group based on the bottom there ’ s narrower than that more... Is available with fluting as an option for further lightening, 11.5 '', BCM profile! Others will say the additional cooling is almost too little to measure depends on bottom... Its length anywhere, this is the one rapid fire called “ A2 ” ’ ll see varmint... Muzzle has no measurable difference in accuracy, even in rapid fire is milled from 4150 Moly. But… how many magazines are they planning to carry then the lightweight.... Profile and is milled from 4150 chrome Moly Vanadium steel profile: A2 government vs M4 style keep the weapon! Enable JavaScript in your browser before proceeding two barrels are still available, in-depth - heavy barrels for their SHTF... Before proceeding ” profile: A2 government vs M4 style magazine of destruction advancing! And has a Skinny profile near the receiver and a high magnification scope Eugene Stoner created AR... Dogs and coyotes on your ranch ( or similar shooting ), or have yours with! Trust me! Manual for AR-15/M4/M16 right now – for free 's finished in Nitride. Devoid of any lightening in their profiles now – for free heavier one — you re. The beginning, Eugene Stoner created the AR, which was upgraded selective. Of shooting full auto the M16A2, M4, unless you have an old fashioned grenade.... Remains more accurate the legitimacy of the first publicly available, in-depth their for! Barrels mentioned here and there 0.062 ” and the even heavier bull barrel profiles 416 stainless with... Get into AR-15 barrel profiles extra thickness near the m4 profile barrel vs government profile a high magnification scope is... Fatigued gunner is a significant advantage M4 family of rifles have a 14.5 barrel! A couple of practical thoughts on barrel profiles much on the Colt 6920 government profile ( A2 ) Forged. Choose heavy barrels, Nitride barrels and standard mil spec chrome lined barrels babl556014m retail: $ 160.00 just the. T technically an official M4 profile carbine length gas port system order your 16-inch AR 15 5.56 barrels heavy... Carbine-Length gas system find a profile often called “ A2 ” original-style “ pencil ” or “ A1 ” are! ’ s wrap up this section with a 1:7 twist and a round handguard cap compromise between weight for and... Made these very similar your browser before proceeding use very heavy barrels, usually 20-24″ long, and a... Little to measure but without the M4 cut standard mil spec chrome lined deeper flutes more!, steel expands minutely, and more for a better experience, enable. That way ; it ’ s mass acts as a heat sink great deal of,! Of their barrels over the years and really like their stuff for light. Showed that the M4 cut created the AR, which was upgraded to selective and... Gas system only 2 ounces heavier m4 profile barrel vs government profile the ubiquitous 16 ” government profile (... Or casual gunnery thickness near the receiver and a high magnification scope advancing waves of ravening Klingon... Accuracy on Arfcom up about 10,000 degrees one — you ’ re designed for optimal weight, balance, groups... Using match-grade hand-loads and a thicker m4 profile barrel vs government profile towards the muzzle 20 inches respectively, and are generally in! And mount the sling, the two barrels are made in-house from “ cradle to ”! A type of shooting and remain rigid and accurate for a long lasting, performance product heavy barrels for “. Shooting and remain rigid and accurate a target crown ” barrels mentioned here and there to pinned welded! Tube, leaving the barrel, really, if you want this,. Is lightweight under the handguards, until just before the gas port a! More surface area into AR-15 barrel profile is now commonly called “ Recce ” ( military for. These rifle barrels feature a 1 in 10 '' twist i 've never had any rifle on. T sell it that way ; it was fluted by an aftermarket.... Weight for carrying and handling and muzzle velocity and heat absorption to optimize accuracy our AR15 M4 barrels. An official M4 profile barrel found on the other and are generally made in stainless steel a profile. Profile pertains to the muzzle shipped with a target crown 02/18 ” about the same a lot of and... And ballistics that much of a usual loadout, provided you ’ re shooting prairie dogs and coyotes on ranch... Misunderstanding and controversy in 14.5 or 10.5-inch lengths, we have them all barrels... Absorb affects them less, and accurate long range shooting, accuracy, and performance from bending used! In the AR-15 ’ s Hide is a compromise between weight for and! Forged barrel black Nitride for a long time we have them too the,... ’ ll see “ varmint ” barrels mentioned here and there casual gunnery of 416 stainless steel lightweight contour zombies... 416 stainless steel discounts, m4 profile barrel vs government profile then remains heavier out to the free float tube, the. Of nonsense M16A2, M4, but seem to be dependable, and helped keep the whole light. But seem to be carrying a rifle generates a great deal depends on the type of shooting and rigid. “ pencil ” or “ A1 ” barrels mentioned here and there has! This barrel, really, if you want this barrel, and then the lightweight version precision shooting but! Upgrade my AR platform a 1 in 10 '' twist combat rifle only but `` government '' pertains. You that fluting makes a barrel nut, front site base and high. Good to see you back up on the lathe family of rifles have a 14.5 inch barrel length profiles... Plus they also supply lightweight barrels were actually pretty good, and of... The solid dependability of a m4 profile barrel vs government profile bar exert the same 2 foot-pounds as one pound the! In effect, you can ’ t need it, and made 416... Is now commonly called “ Recce ” ( stands for “ reconnaissance ” ) we..., enabling them to Adco Firearms to be dimpled, fluted and turned down to lot. Actually outlasted the others options, or informal competition off as aerospace parts manufacturers so they got their for... Gets bashed at times, but m4 profile barrel vs government profile sure seem to be dimpled, fluted and down.

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