hbar型m16 口径： 5.56 × 45mm M193 或 M855 柯尔特公司在 1964 年推出CAR-15枪族时就已经包括了两种重型枪管突击步枪（HBAR，即轻机枪），这些武器是设计用来代替M1918 BAR的。

2024年9月18日 · The Colt HBAR’s M16A2 rear sight with its windage and elevation adjustments make this one of the best iron sight systems out there. The aperture gives off M1 Garand vibes while offering a long...

2004年10月15日 · The military does NOT use HBAR on the M16A2/A3/A4. It looks like an HBAR after the front sight tower, but under the handguards it is thinner. An HBAR AR (20") rifle weights 8.5 lbs, an M16A2 weights 7.5 lbs, even though they look pretty much the …

Colt M16A2 Heavy Barrel Upper Assembly, 20" HBAR, 1/7 Twist, 5.56x45 NATO, in *Very Good* condition. Sold Individually. A2 upper receiver with elevation and windage adjustments. 20 inch heavy barrel. Large hole front pivot pin. "CM" Colt markings on receiver near the rear sights. Black rifle length A2 circle handguards.

三角州公司的hbar型 首先是三位数部分，注意，这些枪型推出的时间顺序并不是按照型号的数字顺序。 例如633是635的衍生型，而645的M16A2要晚于653的M16A1卡宾枪。

柯尔特606型CAR-15重型 突击步枪 M1和重型突击步枪M2就是采用重型枪管来维持自动射击的M16型号，并采用整体式两脚架，重量比一般的M16大得多。 陆军在SAWS（Small Arms Weapons System，枪械武器系统）计划中购买了不足200挺用于试验，不要把这个计划与后来诞生M249的SAW（Squad Automatic Weapon，班组自动武器）计划混淆。 “过渡型SAW” 根据 美国海军陆战队 的需求，WAK公司从1977年开始了“过渡型SAW”（Interim SAW）的研制工作， …

M16A2 Heavy Barrel Upper Assembly, 16" HBAR, 5.56x45 NATO, in *Good* condition. Sold Individually. A2 upper receiver with elevation and windage adjustments. Round forward assist. 16 inch non-chrome lined heavy barrel with bird cage flash hider. Black carbine length A2 round handguards with round cap. Barrel is unmarked, light pitting in the bore.

Colt M16A2 Heavy Barrel Upper Assembly, 20" HBAR, 1/7 Twist, 5.56x45 NATO, in *Good* condition. Sold Individually (unit pictured is what you will receive). A2 upper receiver with elevation and windage adjustments. 20 inch full heavy barrel (not government profile). Small hole front pivot pin. "CM" Colt markings on receiver near the rear sights.

With the classic 20 inch Government profile 5.56x45mm NATO barrel, the BRN-16A2 has an instantly recognizable appearance. The 20 inch barrel has a chrome bore and chamber, with 1-7 twist, perfect for M855 62 grain or heavier bullets. The muzzle is capped by the great performing M16A2 flash hider.

The AR-15A2 HBAR (which stands for Heavy Barrel Automatic Rifle) was the first serious attempt at making the AR-15 into a target shooting rifle that could really compete. The original Colt AR-15 Sporter had been on the market since 1963, but interest in it was mainly confined to military gun buffs and military veterans.