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300 BLK rounds are effective out of barrels as short as 4.5 in (110 mm). Weapons chambered for the round can be as light, compact, and quiet when suppressed as submachine guns like the 9×19mm MP5 , 5.7x28mm FN P90 , and 4.6×30mm MP7 while having more energy and accuracy at longer range.
.300 AAC Blackout United States: 2011 AAI ACR: AAI Corporation: 5.56×45mm sub-calibre flechette United States: no 1989 AC-556: Sturm, Ruger & Co..223 Remington United States: yes 1999-2009 ACAR [6] Lithgow Arms Wedgetail Industries Thales Australia [7] 5.56×45mm NATO/.300 Blackout Australia: 2023 Adcor A-556: Adcor Defense 5.56×45mm NATO ...
The Heckler & Koch HK437 chambered in .300 Blackout and features a 7- and 9- inch barrel was originally announced along with the HK433 in 2017. In late 2022, the Ministry of the Interior, Municipal Affairs, Housing and Sports of the State of Schleswig-Holstein commissioned Heckler & Koch Germany to manufacture and supply the HK437.
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.
SCAR-SC – 5.56×45mm NATO / .300 Blackout subcompact carbine. Weighs 3.1 kg (6.8 lb), has a 7.5 in (190 mm) inch barrel, an overall length of 25.7 in (650 mm) and a length of 21.1 in (540 mm) collapsed and has a pistol grip with no finger rest. It has a lower effective range of 200 m (220 yd). It became available in mid-2018. [47] [48]
In 2019, Steyr Arms introduced a .300 AAC Blackout variant of the AUG A3. [20] [21] The Steyr AUG A3 SF features a Picatinny rail mounted on the telescopic sight and on the right side of the receiver, and includes an external bolt release. [22] The integrated telescopic sight is offered in 1.5× or 3× magnification.
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]
Alternatively, specialized firearms and ammunition may be used to optimize total subsonic ammunition effectiveness. These are designed from the start as dedicated subsonic projectile systems. Some examples include .300 Whisper, 300 AAC Blackout, .338 Whisper, 8.6mm Blackout, 9×39mm, 12.7×55mm STs-130, .500 Whisper, and .510 Whisper.