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The M16A4 rear aperture sights are adjustable from 300 m (330 yd) up to 600 m (660 yd), where the further similar M16A2 iron sights line can reach up to 800 m (870 yd). The introduction of the Picatinny rail required the use of a higher F-marked front sight base to raise the post.
It appears that this round can drastically improve the performance of any AR-15 weapon chambered to .223/5.56 mm. Superior accuracy, wounding capacity, stopping power and range have made this the preferred round of many special forces operators, and highly desirable as a replacement for the older, Belgian-designed 5.56×45mm SS109/M855 NATO round.
The table below gives a list of firearms that can fire the 5.56×45mm NATO cartridge, first developed and used in the late 1970s for the M16 rifle, which to date, is the most widely produced weapon in this caliber. [1]
16 in. A1 1:7 Yes A2 R6521 Colt Carbine (AR-15A2 Government Carbine) (Special export model with receiver block and large pin upper receiver) 3rd Generation Short Ribbed S-1 A2 Yes Yes 5.56 NATO 16 in. A1 1:7 Yes/No A2 R6530 Sporter Lightweight .223 3rd Generation Short Ribbed S-1 A2 Yes Yes 5.56 NATO 16 in. A1 1:7 No A2 R6550 AR-15A2 Government A2
Also known as the CQ 5.56, the CQ-311 or the CQ M-311, this is the select-fire assault rifle version intended for military and police use. It is a gas-operated , rotating-bolt full-automatic firearm that feeds from factory-made 20- or 30-round magazines ( STANAG magazine clones), firing the M193 "Ball" 5.56×45mm NATO cartridge (manufactured in ...
NATO cartridge may refer to: . Small arms 9×19mm NATO (STANAG 4090); 4.6×30mm NATO (STANAG 4820); 5.7×28mm NATO (STANAG 4509); 5.56×45mm NATO (STANAG 4172); 7.62×51mm NATO (STANAG 2310)
[16] [340] However, unlike its counterpart, the 5.45mm round "does not deform or fragment when striking soft tissues." [ 16 ] [ 340 ] Nevertheless, during the Afghan war , the Mujahedeen called the 5.45×39mm round the "Poison Bullet" due to the severe wounds it produced to extremities and the resulting need to amputate.
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