thank god for the aftermarket! On May 12, 2019 at 10:19 pm, Ratus said: You about summed up the idiocy of the government profile barrel. The extra mass helps a little in cooling/controlling heat, but the gain is fairly low and makes the balance of the barrel front heavy. Gov profile was designed so you could mount M203's onto them without ruining the barrel. I use a 16" heavy barrel (fluted) on my AR (shorty). The heavy profile barrel may have MORE inclusions, less homegeneous composition, and warp more than a lighter profile rifled from the same maker. The heavy profile may just have a mediocre chamber and worst case leade that just shoots run of the mill. All of the above have performed beautifully. Lightweight vs government profile barrel Lightweight vs government profile barrel. As far as accuracy difference, there is one. Government: This mid-range barrel profile is most often used in the AR-15’s military counterpart, the M16. I know they both have there pros and cons and to be honest I am kinda leaning towards the SOCOM just to say I have a more robust barrel. Cold Hammer Forged vs. Mil-Spec This is called a "heavy" barrel by the military, but to civvies it is more of a "midweight" barrel. Carbinedude; Please go to the Bushmaster site and look at the BIG difference between the Government-profile barrels and the heavy barrel. The most common is the “government” profile barrel which is a mid-range option. Obviously the heavy barrel is more versatile on a prairie dog hunt or when you intend on sending quite a bit of lead down range at one shooting session but often a short, stout, thin barrel has already sent it's payload downrange before it can devlop the vibrations and harmonics that can effect external ballistics and accuracy. Government Profile Vs. Pencil Barrel – My Blog; Comments. The profile refers to the weight of the barrel. The lightweight, or pencil, barrels are good for those looking to shave some weight off their gun. Profiles are broken down into three basic categories: lightweight, government, and heavy. The heavier the barrel, the greater the resistance it provides to the buildup of heat when firing the weapon. On May 12, 2019 at 9:46 pm, MTHead said: Thanks Herschel, always wondered about those goofy looking things. Hey guys! Is there any practical role for the M4A1 barrel? Unless you plan on shooting so much that you will need the heat advantages of the heavier profiles, I just don't see a huge benefit outside of some special circumstances (like Mark mentioned above). Does it have much utility in military service? So I replaced the HBAR barrel on my Colt. The heavy barrel is used on high-accuracy and rapid-fire weapons for obvious reasons. The government's heavy-handed tactics threaten to undermine the legitimacy of the election. Bottom line- I like it. its heavy(er) than a basic government profile barrel but it is by no means a heavy rifle. Its the same one they use on their national match rifle. Swapped in a SOCOM M4 barrel. The only reason I have the government profile is that BCM didn't make a pencil profile 20" barrel. But a question. APOC Armory. Heavy, or bull, barrels are thicker and weigh more, but offer more heat-resistance and stiffness, which both increase accuracy. Counting mine, I've put together 2 guns with their 18" and both printed consistently around 1/2" at 100 yards shooting the same ammo from the same position on the same day, sandbagged to hell. If it were my money to spend, after I got the lower squared away, I would buy both a heavy barreled stainless upper and a gov profiled chrome lined upper. Have a 16 and 18(SPR) in 5.56, a 9.5 300BO, and just got a 20" heavy fluted 6.5 CM Barrel. But I wanted to get yalls opinions on the matter. 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