Patent ID: 9638484
Date: 2017-05-02
CPC Classifications: F41A

Claim:
1. A rifle apparatus for firing a plurality of different calibers of ammunition comprising: a receiver body having a barrel attachment nose projecting from a forward end of the receiver body, wherein the barrel attachment nose has exterior threads thereon; a replaceable rifle barrel for firing at least a selected one of the plurality of different calibers of ammunition, the replaceable rifle barrel having a rearward end portion and a threaded portion forwardly of the rearward end portion, wherein the rearward end portion of the replaceable rifle barrel is receivable in the barrel attachment nose of the receiver body and the threaded portion of the replaceable rifle barrel has exterior threads thereon; a barrel attachment collar positioned around the replaceable rifle barrel, wherein the barrel attachment collar has a threaded portion with interior threads sized for threaded attachment to the exterior threads of the barrel attachment nose and the barrel attachment collar also has an inwardly extending retention shoulder positioned forwardly of the threaded portion of the barrel attachment collar; a barrel adjustment nut having interior threads and an outwardly extending retention shoulder, wherein the barrel adjustment nut is threadedly received on the threaded portion of the replaceable rifle barrel and the outwardly extending retention shoulder of the barrel adjustment nut is configured and is positioned within the barrel attachment collar for abutting a rearward surface of the inwardly extending retention shoulder of the barrel attachment collar; and a barrel jam nut which is threadedly received on the threaded portion of the replaceable rifle barrel forwardly of the barrel adjustment nut.