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The Ruger-5.7 is a semi-automatic pistol introduced in December 2019 by Sturm, Ruger & Co. [3] It is the first traditionally-styled semi-automatic pistol to be chambered for the 5.7×28mm cartridge since the introduction of the Excel Arms MP-57 in 2012. [4]
This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same load as the highest muzzle velocity, since the bullet weights can differ between loads).
The Ruger AR-556 is a semiautomatic AR-15 style rifle manufactured by U.S. firearms company Sturm, Ruger & Co. Introduced in 2014 as an entry-level AR-15 using a direct impingement action, with variants since being released such as the upgraded AR-556 MPR (multi-purpose rifle) in 2017 [1] and the AR-556 pistol in 2019.
Both share an identical head/rim. The 450B is limited to 35,000-psi, which is more common in pistols, and lower than similarly sized rifle cartridges. The 450B uses .452" diameter bullets, most often seen in the abundant 45-caliber pistol styles. The 300gr version is rated at 1900fps at the muzzle, and the 250gr at 2200fps. 458 SOCOM ...
The SIG MCX VIRTUS Pistol is the pistol configuration of the MCX VIRTUS which features an SBX stabilizer brace. It features an 292 mm (11.5 in) barrel for the 5.56×45mm NATO caliber, and a 229 mm (9 in) barrel for the .300 AAC Blackout caliber.
The pistol accepts the same STANAG magazine that is used in the M-16, AR-15, and other NATO rifles chambered for 5.56×45mm. [3] The PLR-16's frame is constructed of reinforced polymer, making the pistol both durable and light-weight. The frame incorporates a Picatinny rail molded to the top of the receiver to accept various optical sights. [2]
The 6×45mm cartridge provides better down range performance than the .223 Remington or the 5.56 NATO cartridges. The cartridge is currently offered by Les Baer in an AR rifle. The cartridge had been offered by Cooper Arms, Kimber and a few other rifle manufacturers in their rifles as a regular factory chambering for a period of time. [3]
The KAC PDW fires a 6×35 mm cartridge, which is over a centimeter shorter than the 5.56×45mm NATO round. The 6mm bullet is slightly wider, and the standard 6×35mm bullet slightly heavier, than the standard 5.56mm bullet (65 grains (4.2 g) versus 62 grains (4.0 g)).