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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 ...
The first project undertaken by the company was an injection molded AR-15 rifle lower receiver. The company then moved to AR-10 style rifle lower receivers, and finally pistol receivers. [14] The name of the company refers to the injection molding process combined with the common designation of unfinished receivers as "80% receivers". [14]
It has always been possible to make firearms from raw materials, and more recently it has become popular among firearms hobbyists to produce receivers from plastic with a 3D printer, though the variety of materials and methods used to create these receivers are of varying quality. [2] An AR-15-esque (lower) receiver blank created using a 3D printer
FMK's first generation polymer lower receiver was the FMK AR1 Patriot. It had reports of breakages at the rear takedown pin. [citation needed] After redesign in 2013 the FMK AR1 Extreme was introduced replacing the Patriot. The redesign included beefing up the area around the rear takedown pin.
The DEFCAD Charon is an open source [1] 3D-printable AR-15 lower receiver project that was partially inspired by the Fabrique Nationale P90. It began as a design exercise by a DEFCAD user to explore FDM additive manufacturing technology as a means of integrating the P90's ergonomics into a stock for the AR-15, resulting in the WarFairy P-15 ...
In October 2014, Defense Distributed began selling to the public a miniature CNC mill for completing receivers for the AR-15 semi-automatic rifle. [35] For a review of the machine in Wired , Andy Greenberg manufactured a series of lowers and called the machine "absurdly easy to use."
The WarFairy P-15 is a 3D printed Fabrique Nationale P90 stock [1] [2] [3] made public around May 2013. [1] It was printed using a LulzBot Taz printer [4] via the fused deposition modeling (FDM) method. [5] It was created by WarFairy [2] [3] The stock works a lower receiver for the FN-P90 but would work with any standard AR. [4]
The AR Lower V5 is a 3D printed lower receiver for the AR-15 rifle. [1] It was created in March 2013 Defense Distributed printed using the Stratasys Dimension SST 3-D printer [1] [2] using the fused deposition modeling (FDM) method. [2] The receiver was able to handle enough stress to fire more than 600 rounds. [1]