In contrast, M16s and the earliest AR-15s feature a light barrel profile (the difference in weight between an M16A4 and an M4 is only 1 lb.), which yields completely different handling and balance ...

The M4-22 is a blow-back operated ... The Pro model’s Parkerized, round-profile barrel is traded out for a fluted 4150 steel barrel treated with a red Duracoat finish. The metallic and polymer ...

Compared to the M4 , the M4A1 has full auto capability, a consistent trigger pull, and a slightly heavier barrel. The heavier barrel is more durable and has greater capacity to maintain accuracy ...

The M4 and M16 family of rifles don’t deserve ... which are handguards that do not interface with the barrel in any way. The current quad rails are connected to the front of the barrel at ...

but the barrel and ammo will also contribute heavily. As such, the Army has label this specification as “desirable,” rather than required. The extended rail means that a new low-profile gas ...

“The heavier barrel is more durable and has ... The improved rail will also have to include a low-profile gas block that could spell the end of the M16/M4 design’s traditional gas block ...

“The heavier barrel is more durable and has ... The improved rail will also have to include a low-profile gas block that could spell the end of the M16/M4 design’s traditional gas block ...

The U.S. Marine Corps has officially adopted the M4 carbine to replace the M16. An official confirmed to Military.com on Tuesday that Commandant Gen. Robert Neller has approved the decision ...