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The .300 AAC Blackout (designated as the 300 BLK by the SAAMI [1] and 300 AAC Blackout by the C.I.P. [2]), also known as 7.62×35 mm, is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine.
.300 AAC Blackout: Rate of fire ~800 rounds per minute cyclic: ... a short barrel with a very short gas impingement system and fast rate of rifling twist, ...
The .300 Whisper (7.82×34mm) is a CIP standard [1] cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries.It was developed as a multi-purpose cartridge, capable of utilizing relatively lightweight bullets at supersonic velocities as well as heavier bullets (200–250 grains) at subsonic velocities.
It features a 292 mm (11.5 in) barrel for the 5.56×45mm NATO caliber, and a 140 mm (5.5 in) barrel and 229 mm (9 in) barrel for the .300 AAC Blackout caliber. [ 4 ] [ 3 ] The SIG MCX VIRTUS Pistol is the pistol configuration of the MCX VIRTUS which features an SBX stabilizer brace.
Rate of fire: 850 rounds/min: ... (1 in 7 inch) right-hand twist, six-groove rifling. ... .300 Blackout 745 487 178 3040 HK437 Sneaker 11".300 Blackout 795
.300 AAC Blackout [2] 9×19mm Parabellum [1].40 S&W: Action: ... The standard rifle-length barrel features 6 right-hand grooves and a rifling twist rate of 228 mm (1: ...
The overall case length after the shortening and re-sizing is 1.565". The cartridge was designed to use .308" diameter bullets in weights of 110 to 150 grains, with a standard twist rate of 1-12". [1] Wilson Combat states that heavier bullets can be used in a barrel with a 1-8" twist rate for subsonic loads. [4]
The ARAD is an assault rifle visually similar to the AR-15, [2] though it uses a short-stroke gas piston, rather than the direct impingement system seen in the AR-15. [3] It is chambered in either 5.56×45mm NATO or .300 AAC Blackout and is designed to be modular, allowing a change of caliber through a quick-change barrel. [4]