CHAMBER ADAPTOR INCORPORATED INTO A MODIFIED ACTION ASSEMBLY FOR PERMITTING SUBSTITUTION OF A FIRST MANUFACTURER SPECIFIED CARTRIDGE FOR A SECOND SUBSTITUTE CARTRIDGE
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.
1 . 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, said assembly comprising:
an elongated body incorporated into a barrel accessible location of the firearm and supporting a bolt in reciprocating fashion; and
said chamber adaptor mounted to forward end of said body in communication with said bolt and exhibiting a modified diameter aperture extending therethrough corresponding to an incremental modification in diameter associated with the substitute cartridge.
2 . The assembly as described in claim 1 , said body further comprising of a receiver plate exhibiting a generally lengthwise extending notched or keyed interior, established between generally parallel extending sides with identified and interiorly notched locations (for seating a reciprocating bolt.
3 . The assembly as described in claim 1 , said body further comprising a dual rail configuration to which is reciprocally mounted said bolt and from which in turn forwardly projects a firing pin.
4 . The assembly as described in claim 1 , said chamber adaptor exhibiting a specified shape and size and permitting substitution of a 0.22 LR rimfire cartridge in lieu of a normally designated 5.7×28 mm center fire cartridge.
5 . 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, said assembly comprising:
an elongated body incorporated into a barrel accessible location of the firearm and supporting a bolt in reciprocating fashion, said body further comprising of a receiver plate exhibiting a generally lengthwise extending notched or keyed interior, established between generally parallel extending sides with identified and interiorly notched locations (for seating a reciprocating bolt; and
said chamber adaptor mounted to forward end of said body in communication with said bolt and exhibiting a modified diameter aperture extending therethrough corresponding to an incremental modification in diameter associated with the substitute cartridge.
6 . 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, said assembly comprising:
an elongated body incorporated into a barrel accessible location of the firearm and supporting a bolt in reciprocating fashion, said body further comprising a dual rail configuration to which is reciprocally mounted said bolt and from which in turn forwardly projects a firing pin; and
said chamber adaptor mounted to forward end of said body in communication with said bolt and exhibiting a modified diameter aperture extending therethrough corresponding to an incremental modification in diameter associated with the substitute cartridge.