Patent ID: 8162100

Claim:
A suppressor for a firearm, comprising: an elongate body having a bullet entry end, an opposed bullet exit end, and a longitudinal axis, wherein the elongate body defines a bullet pathway extending longitudinally therethrough from the bullet entry end to the bullet exit end; a piston assembly rotatably coupled to the elongate body adjacent the bullet entry end configured to fixedly attach to a barrel of the firearm, wherein the piston assembly comprises a piston, an indexing ring attached to the piston at a piston bullet entry end and an annular spring retainer rotatably coupled to the indexing ring, wherein the indexing ring is radially fixed relative to the piston, wherein the spring retainer is rotatable relative to the piston, wherein the spring retainer is fixed relative to the elongate body, wherein an exterior surface of the spring retainer is threaded, and wherein the exterior threads of the spring retainer matingly engage corresponding threads on an inner diameter of the elongate body; and means for selectively orienting and selectively fixing the elongate body relative to the piston assembly, wherein the means comprises a cam assembly.