Patent ID: 8800424

Claim:
A buffer assembly for a firearm, the assembly comprising: an elongated rod having a forward end and a rearward end; a cylindrical buffer that defines a buffer bore that receives the rod and is operable to reciprocate between a forward battery position and a rearward retracted position; a coil spring that encompasses the rod; the buffer bore receiving a forward portion of the spring; a resilient spring stop attached to the rearward end of the rod, the spring stop having a diameter larger than the spring diameter; wherein the resilient spring stop defines a central spring stop bore that receives a rear portion of the spring; wherein the forward end of the rod has a limit element having a head that is larger in diameter than the rod; wherein the buffer has an internal limit element that is larger in diameter than the rod; wherein the internal limit element has at least one portion that is smaller in diameter than the limit element head, but also larger in diameter than the rod; the spring stop having a limit spring support surface and the buffer having a buffer spring support surface, each spring support surface supporting a respective end of the spring, and facing each other; wherein when the buffer is in the rearward retracted position it contacts the spring stop such that the spring is entirely contained by the central spring stop bore and the buffer bore when the buffer is in the rearward retracted position.