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3 hours ago · 30-round detachable STANAG magazine [a] Sights. Iron sights or various optics. The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO, select-fire, gas-operated, [b] magazine -fed carbine -length assault rifle developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle.
1 day ago · The bullet leaves the muzzle at subsonic velocity, so it does not generate a sonic shock wave in flight. As a result of reducing the barrel's length and venting propellant gases into the suppressor, the bullet's muzzle velocity was lowered anywhere from 16% to 26% (depending on the ammunition used) while maintaining the weapon's automation and reliability.
