Centerfire bolt head assembly and replacement method therewith

Details Centerfire bolt head assembly and replacement method therewith Centerfire bolt head assembly and replacement method therewith

1998-07-13

2000-05-16

Jordan, Charles T.

Firearms

Breech loading

Sliding breechblock

42 6901, F41A 380

Patent

active

060619449

ABSTRACT:
A replacement centerfire bolt assembly for a rimfire rifle having a two-piece bolt with a detachable bolt head assembly and a method for modifying a bolt are disclosed. In accordance with the method, the bolt is first removed from the rifle, and then the rimfire bolt head assembly is removed from a remainder of the bolt. Next, a centerfire bolt head assembly is attached to the remainder of the bolt in place of the rimfire bolt head assembly. This centerfire bolt head assembly includes a bolt head having a central longitudinal axis, a cartridge end, a striker end, and an exterior size and configuration functionally identical to a size and configuration of a rimfire bolt head of the rimfire bolt head assembly. A bore is provided along the central longitudinal axis of the bolt head, with this bore including an enlarged recess adjacent the striker end. A one-piece centerfire firing pin is located in the bore of the bolt head, which firing pin is longer than the bore. This centerfire firing pin includes a head adjacent the striker end which is received in the recess. A spring is located in the recess and around the centerfire firing pin between the head and a bottom of the recess which urges the centerfire firing pin away from the cartridge end. After attachment of the centerfire bolt head assembly, the bolt is replaced in the rifle to complete the conversion process.

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