US 5,666,755 A · Method and apparatus for fast disassembly of blowback autoloading pistol

Abstract

A method and a device for retrofitting existing autoloading pistols having a one-piece bolt stop pin. The first step of the retrofitting method is to cut off the original bolt stop pin and then machine a threaded bore in the remaining shaft. In addition, an extension which mimicks the original bolt stop pin configuration is manufactured. The extension has a threaded end which is screwed into the threaded bore in the remaining shaft portion of the original bolt stop pin. To disassemble a pistol having a two-piece bolt stop pin, the bolt stop pin extension is unthreaded from the remaining shaft portion using a screwdriver or similar implement. Then the loose extension is pulled upwards and out of the receiver, freeing the bolt to be pulled rearward and out of the receiver. The pistol is further modified by rounding the sharp upper corner of the hammer, e.g., by machining a smooth radius. As a result of this modification, when the leading edge of the reinserted bolt contacts the rounded upper corner, the hammer will be cammed downward and out of the way as the bolt is reinserted. When the bolt is fully inserted, the bolt stop pin extension can be screwed back into the remaining shaft portion of the original bolt stop pin, thus locking the bolt to the pistol.

Claims13

Dependent claims

In a pistol comprising:

a grip frame having a recess;
a receiver mounted on said grip frame and having a breech and a hold communicating with said breech;
a bolt assembly received in said breech of said receiver, said bolt assembly comprising a firing pin and a recoil spring guide assembly;
a hammer pivotably mounted to said grip frame, said hammer being configured to strike said firing pin when pivoted;
a main spring housing assembly arranged in said recess of said grip frame and comprising a housing having a channel, a main spring arranged in said channel and a plunger slidably arranged in said channel in contact with said main spring;
a strut pivotably coupled to said hammer;
and
a bolt stop pivotably mounted to said main spring housing, said recoil spring guide assembly being in abutment with said bolt stop,
the improvement wherein said bolt stop comprises an upper pin part, a lower pin part and means for coupling said upper pin part to said lower pin part, said upper pin part penetrating said hole in said receiver and said lower pin part being pivotably mounted to said main spring housing and having a height which does not interfere with removal of said bolt assembly from said receiver when said upper pin part is uncoupled from said lower pin part and removed from said receiver.

6 more elements

Dependencies are inferred from the claim text.

Method and apparatus for fast disassembly of blowback autoloading pistol

Life of this patent

Method and apparatus for fast disassembly of blowback autoloading pistol

Life of this patent

Abstract

Claims13