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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 ...
In addition, under US gun law, a receiver that is legally a machine gun cannot legally become semi-automatic. [4] There is no federal restriction on the purchase and import of machine gun parts kits (minus the barrel), however. [3] Parts kits are available for many firearms including the AR-15 and AKM variants. [5] [6] [7]
ArmaLite AR-15 with the charging handle located on top of the upper receiver, protected within the carrying handle and a 25-round magazine. 1973 Colt AR-15 SP1 rifle with "slab side" lower receiver (lacking raised boss around magazine release button) and original Colt 20-round magazine.
The final prototype, featured an upper and lower receiver with the now-familiar hinge and takedown pins, and the charging handle was on top of the receiver placed inside of the carry handle. [27] For a 1950s 7.62×51mm NATO rifle, the AR-10 was incredibly lightweight at only 6.85 pounds (3.11 kilograms) empty. [ 27 ]
Rifles styled like the AR-15 come in many sizes and have many options, depending on the manufacturer. The lower receiver, without the receiver extension, rear takedown pin, and buttstock, is shown at bottom. An AR-15–style rifle is a lightweight semi-automatic rifle based on or similar to the Colt AR-15 design.
The Colt AR-15 is a product line of magazine-fed, gas-operated, autoloading rifle manufactured by Colt's Manufacturing Company ("Colt") in many configurations. [1] The rifle is a derivative of its predecessor, the lightweight ArmaLite AR-15, an automatic rifle designed by Eugene Stoner and other engineers at ArmaLite in 1956.
While 3D-printed parts are made in the development and production of conventional firearms, they are more commonly associated with DIY guns in American gun politics. 3D-printed parts complicate the debates regarding high-capacity magazine and assault weapon bans, as well as federal regulations like the ATF's pistol brace rule.
The AR-10B prototype was composed of individual sub-components tested on a special lower receiver made of two slabs of aluminum fitted to a Knight's Armament Company SR-25 upper receiver assembly, [citation needed] and prototyped using computer analysis. The full prototype AR-10B was the first rifle off the production line.