US Patent:
20120005931, Jan 12, 2012
Inventors:
Charles C. Kelly - Kirksville MO, US
Jordan Bowles - Columbia MO, US
Tyson Bradshaw - Kirksville MO, US
Craig Pudil - Boonville MO, US
Taz B. Pfefer - Ashland MO, US
John L. Overstreet - Fayette MO, US
International Classification:
F41A 3/12
Abstract:
A retrofit chamber adaptor associated with a substitute action assembly incorporated into a firearm for permitting the substitution of an original designated cartridge for a substitute cartridge. An elongated body is incorporated into a barrel accessible location of the firearm and supporting a bolt in reciprocating fashion. The chamber adaptor is mounted to forward end of the body in communication with the reciprocating bolt and exhibits a modified diameter aperture extending therethrough and corresponding to an incremental modification in diameter associated with the substitute cartridge. Additional features include a receiver plate incorporated into the body and exhibiting a generally lengthwise extending notched or keyed interior established between generally parallel extending sides with identified and interiorly notched locations for seating in reciprocating fashion therebetween the reciprocating bolt. A further variation of the adaptor exhibits a dual rail configuration to which is reciprocally mounted the bolt and from which in turn forwardly projects a firing pin. In a preferred application, the chamber adaptor permits substitution of a 0.22 LR rimfire cartridge in lieu of a normally designated 5.7×28 mm center fire cartridge.