Patent ID: 8397623

Claim:
A rifle, comprising: a receiver body system including an upper receiver body and a lower receiver body detachably attached to the upper receiver body, the upper receiver body having a bolt carrier receiving bore exposed at a portion thereof that engages a stock engaging portion of the lower receiver; a stock including a recoil spring receiving bore therein exposed at a mounting portion thereof, wherein the mounting portion of the stock is engaged with a stock engaging portion of the lower receiver body in a manner whereby the recoil spring receiving bore is accessible from the bolt carrier receiving bore and wherein a centerline axis of the recoil spring receiving bore is skewed with respect to a centerline axis of the bolt carrier receiving bore; and a bolt carrier group having a bolt carrying structure slideably disposed within the bolt carrier receiving bore, a recoil spring engaging structure slideably disposed within the recoil spring receiving bore and a linkage member structure pivotably engaged between the bolt carrying structure and the recoil spring engaging structure, wherein a bolt of the bolt carrier group is rotatably mounted within a corresponding bore of the bolt carrying structure, wherein the bolt rotates about a centerline axis of the bolt carrier receiving bore, wherein the bolt carrying structure includes a concave bearing surface within an end portion thereof, wherein an end portion of the linkage member is engaged with the concave bearing surface, and wherein the concave bearing surface is vertically positioned at the centerline axis of the bolt carrier receiving bore.