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The .450 Bushmaster is descended from the Thumper concept popularized by the gun writer Jeff Cooper.Cooper was dissatisfied with the small-diameter 5.56×45mm NATO (.223 Remington) of the AR-15, and envisioned a need for a large bore (.44 cal or greater) cartridge in a semi-automatic rifle to provide one-shot kills on big-game animals at 250 yards.
The result of the Kasler v. Lockyer was a list of AR and AK-style firearms that are banned in California by name. These firearms include the Armalite AR-15, Bushmaster XM-15, Colt AR-15, Kalashnikov USA Hunter Rifle, MAADI CO AK-47, ARM, MISR, and MISTR, to name a few. There are a total of 84 firearms that are banned by name on this list.
Bushmaster Firearms originally produced their 'First Generation' rifle using an aluminum lower receiver and a stamped steel upper receiver. This first-generation model used a long-stroke gas piston operating system. The recoil spring was within the upper barrel gas system compared to the AR-15/M-16, where the recoil spring is within the butt stock.
A disassembled Mauser action showing a partially disassembled receiver and bolt. In firearms terminology and law, the firearm frame or receiver is the part of a firearm which integrates other components by providing housing for internal action components such as the hammer, bolt or breechblock, firing pin and extractor, and has threaded interfaces for externally attaching ("receiving ...
Bushmaster Arm Pistol, a 5.56×45mm NATO weapon classified as either a long pistol or short rifle; Bushmaster M17S, a semi-automatic bullpup rifle; Bushmaster ACR, an assault rifle originally designed by Magpul; Bushmaster XM-15, a line of AR-15 pattern rifles and carbines; Bushmaster M4-type Carbine, a carbine in the XM-15 family
The standard XM-15 has a forged 7075T6 aircraft-grade aluminum upper and lower receiver. Barrels of XM-15 firearms have a heavy profile and are hard chrome-lined 4150 alloy steel or 416 stainless steel. [2] [4] In Bushmaster's 2016 sales brochure, all new-production XM-15s are stated to be supplied with a 4150 steel barrel. [5]
The KAC's lower receiver, holding the magazine and trigger assembly, is essentially a shortened M16 rifle lower receiver, which makes the basic operating controls familiar to many potential users. [ citation needed ] However, the cartridge, upper receiver, and operating mechanism are all new designs by KAC.
The IWS is chambered in a 15.2×169 mm armor-piercing fin-stabilized discarding-sabot cartridge, and is the first man-portable rifle to use this type of ammunition. The first variant of the weapon was the proposed AMR 5075 (AMR standing for anti-materiel rifle). It was to fire the same type of ammunition as the IWS 2000 and to use a 5-round ...