Abstract: An improved buffer for small arm weapons utilizes a pair of fluid containing reciprocating chambers to attenuate recoil forces by limiting fluid flow in relation to chamber travel between the pair. In the second chamber of the pair a flow control element moves in the direction of a restricting member when the fluid pressure drop through the flow control element reaches a predetermined point. The flow restricting member limits fluid flow through the flow control element when the flow control element travels to a point proximate the flow restricting member. Fluid flow in the opposite direction is substantially unrestricted by the flow restricting members.