-Bayonets — not saying never but as civilians we can carry sidearms regardless of “rank.” Bayonets are often used for soldiers prohibited from carrying sidearms. Some are just different than Milspec because the buyer wants a different machine for a different purpose or with different parts simply because that’s what he wants. On May 14, 2019 at 12:48 pm, SGM Settles (Ret.) The BCM 20” government upper and barrel is a quality piece of hardware that will certainly scratch that “retro” itch you might be feeling. Your statement is almost 100% correct, but not quite. That put it on the map for me…and I was happy to get my hands on one of their Hanson barrels after. 1. And if you go 18″, you really want an intermediate gas system, not midlength and not rifle even though intermediate is incorrect for SPR clones.”. This is one of the reasons the open-prong flash-hiders went away. and a G7 ballistic coefficient, this means a 20″ rifle will get the bullet going fast enough to fragment reliably to 125m and sorta-reliably to 160m. If you want the solid dependability of a government profile barrel in 14.5 or 10.5-inch lengths, we have them too. Compare Hanson profile barrels to gov’t. it may still tumble or yaw in soft tissue but rarely fragments. However, cold steel still has its place in combat. Re 16 vs 20″ — you really only see differences in trajectory beyond 300 yards. Regarding bayonets: Don’t say “never.” They have been used in close combat up through near-current times. “Math” AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. https://youtu.be/beaBDC8iS-E. On May 13, 2019 at 8:30 pm, The Wretched Dog said: Not withstanding anything written above, to what extent did the first 60% of the ‘government profile’ barrel remain ‘thin’ so as to be able to mount the M203 grenade launcher – without changing the mounting hardware? So the Logisitcs people had “Barrels Bending” on their list of “M16A1” things to “Improve” right after listing “Handguards Breaking.”. You want this barrel, really, if you want a barrel that you can take anywhere, this is the one. Caliber: 5.56mm NATO Barrel Length: 11.5" Twist Rate: 1:7 Muzzle Thread: 1?2x28 TPI (Threads Per Inch) Material: Chrome Moly Vanadium Outside Finish: Mil-Spec Heavy Phosphate Inside Finish: Chrome Gas System: Carbine Length Diameter At Gas Port: .750 Barrel Extension: A4 Barrel Profile: Government … It is well-established that the Mini-14’s lousy accuracy in the earlier-production models was in large part due to the thin, whippy barrel beyond the gas block. Below 2550 f.p.s. had to qualify right after chow. This also, with the same length firearm, slows the cyclic-rate (longer 9-inch gas tube, compared to 7-inches with the M4geries) which seems to be good for the rifle. Details. While everything stated in the article above may well be true, I do not believe that the government profile barrel is “dumb.” The increased thickness beyond the front sight block dampens barrel harmonics, and reduces deflection from sling tension, making the weapon more accurate. Shop TRYBE Defense 10.5 in Government Profile AR Pistol Barrel, 9mm | 33% Off 4 Star Rating on 2 Reviews for TRYBE Defense 10.5 in Government Profile AR Pistol Barrel, 9mm + Free Shipping over $49. It isn’t a shovel, it isn’t a hammer, it isn’t a pry bar, and as for bayonet charges, you’re not going to do one. And the top end AR-15 manufacturers need to get away from fabricating “government profile” barrels. When we removed this “mound”, the barrels would all pass the Drop Gauge. (Note: I DO NOT recommend conducting an assault with bayoneted, empty, rifles, as was done several times in WWI!) As has been previously noted, fixing bayonets gives a psychological advantage to the ones who are willing to close with and kill with a “spear-tipped” rifle. Talk about a tough job! When one puts his bayonet on the end of his rifle, he suddenly gets VERY serious, and the enemy has a choice: Meet him with HIS bayonet fixed, or run away. -Get a middleweight rifle and A2 front sight and your bayonet is again in the correct position. SOP during those fights was that every Marine had a bayonet affixed to his rifle (whether it was a Springfield M1903 or an M-1 Garand) anytime they were on alert. The best research I can find on why such a thing exists shows the idea to be extremely dumb. I’ve often wondered about that. So I don’t see a lot of benefit to the average shooter beyond benchrest/precision competition use… YMMV. As for bayonet use, am I wrong in thinking that a civilian 16″ barrel with a carbine length gas system and an A2 front sight, puts the bayonet lug in the wrong place, since the military M4 is 14″? -Thickness in front of the front sight is dumb. As to the burr at the port: A fellow once asked a premium barrel maker (Krieger if I recall correctly) how they managed to drill their gas port in the groove rather than a land & be so clean about it. W/ a 300 yard zero, differences are seen at 100+ yards w/ 100 and 200 yard POI running higher and 400 yard POI running lower. I’ve reviewed several of their barrels over the years and really like their stuff for the price point. From a competition standpoint, the front sling attachment is on the barrel of a standard rifle, so a tight sling does change POI. at that price they could have the finest aftermarket guns available. As for guys using their rifles as prybars, you still had leftovers of McNamara’s 100,000 in place, so stupid human tricks are gonna be a lot more frequent. As far as “prying open crates” what folks are talking about is using the original open-prong flash hider to break open the steel “band-it” straps around wood ordnance crates. 20' AR-15 AR15 barrel kit includes barrel, handguards, gas tube, delta ring, front sight assembly and flash hider. Only if you have a full auto gun would I consider a cold hammered forged and chrome lined lightweight barrel over the above options… For these, you’re looking at FN/Palmetto Premium, BCM, Daniel Defense, Noveske, Sionics, etc. Most discussions around profile revolve around the 5.56 variants, but different profiles may apply to different calibers as well. Right to Bear is pleased to offer you the Ballistic advantage 14.5-inch govt profile barrel (model #: BABL556010M), a U.S.-made quality barrel with a concentric design. Zero reason for carbine length gas on a 16″ barrel. It all started with a drop gauge test. So we made that part of the barrel thicker because we did not want the excess weight of a full length heavy barrel. Theory is that by removing the shoulder lump it reduces barrel whip and makes it easier for follow-up shots and overall accuracy. But “effect” is a verb (e.g., to effect a change). Your rifle isn’t a spear. I’ve got 6 or 7 16-inch “pencil” barrels from DD, and they all shoot MOA with 77s from Black Hills or Hornady, and they shoot 1.5 with bulk M855 Green Tip. But Faxon’s barrels are stress relieved and if going super lightweight/pencil is likely a better call than BA, but a little more expensive. So I don’t see a lot of benefit to the average shooter beyond benchrest/precision competition use… YMMV. A lot of their techniques and choices of rifle components have origins in competition. -M203s mount to the Socom profile which is heavy under the HGs, but with flats milled. As best as I can tell, not only didn’t they solve a real problem, they didn’t even solve the pretend problem. While everything stated in the article above may well be true, I do not believe that the government profile barrel is “dumb.” The increased thickness beyond the front sight block dampens barrel harmonics, and reduces deflection from sling tension, making the weapon more accurate. Which is what my favorite GM M16A1 had. Like I said — yesterday was a long day. On May 13, 2019 at 10:41 am, Badger said: The profile even differs within makers. A government profile AR-10.308 barrel presents a fairly uniform diameter, this gives you the luxury of quite a number of choices for which handguard to use. Involved in this case will be able to see and feel the difference between and... When I finally got the -A2, then carried M4s in Afghanistan and Iraq that! Stuff, this is easier to achieve with a 16″ barrel taking off! 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