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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 barrel has a chrome-lined bore with 6 right-hand grooves and a 178 mm (1:7 in) rifling twist rate that is optimized for use with heavier SS109 5.56×45mm NATO rounds. A barrel with a 305 mm (1:12 in) twist rate designed specifically to stabilize the lightweight M193 cartridge is also available. [ 2 ]
The standard Negev is chambered in 5.56×45mm NATO, optimized for the SS109 cartridge. The Negev NG-7 and 7 ULMG variants are chambered in 7.62×51mm NATO.
4.6×30mm – PDW; 5.45×39mm [2] – intermediate; 5.56×45mm NATO – Original M16A1 cartridge: Can also safely fire .223 Remington, intermediate [2]; FN 5.7×28mm – PDW; 6mm Mongoose (wildcat)
The M16A2 fires the improved 5.56×45mm (M855/SS109) cartridge and has a newer adjustable rear sight, case deflector, heavy barrel, improved handguard, pistol grip, and buttstock, as well as a semi-auto and three-round burst fire selector. [21] Adopted in July 1997, the M16A4 is the fourth generation of the M16 series.
The barrels used in the Minimi have an increased heat capacity for sustained fire, feature a chrome-lined rifled bore (six right-hand grooves) and are manufactured in two versions: with a 178 mm (1:7 in) twist rate used to stabilize the heavier Belgian 5.56×45mm SS109 projectile, or a 305 mm (1:12 in) twist for use with American M193 ...
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]
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)