Patent attributes
A buffer assembly has a rod, a cap having a forward end against which a bolt carrier pushes during a firing cycle, the cap being movable along the rod, a shock absorbing plug attached to a rearward end of the rod for engaging an end wall of a receiver extension during an intermediate part of the firing cycle, a buffer tube moveable on the rod, a buffer spring engaged between the plug and the buffer tube for biasing the buffer tube toward a forward position, a counterweight mounted for movement on the rod, a shock absorbing washer between the counterweight and the cap for smoothing an impact between the counterweight and the cap at an end of the firing cycle, and a counterweight spring that is weaker than the buffer spring, for biasing the counterweight toward the cap.
