Patent ID: 7201094

Claim:
A semiautomatic or automatic firearm comprising: a bolt head configured to alternate between a forward position and a rearward position in response to the firing of one or more cartridges, wherein a component of the bolt head movement is along an axis transverse to the firing axis of the barrel of the firearm; and a slider comprising an initial or first sloped surface and a second sloped surface to contact the bolt head or a linkage to the bolt head; and a slider path along which the slider moves; wherein an angle α is formed between the first sloped surface of the slider and the slider path and the angle α is between about 6 degrees and about 45 degrees; wherein the bolt head is configured to transmit an impulse to the slider as the bolt head alternates between the forward position and the rearward position, the impulse having a component perpendicular to the firing axis of the barrel of the firearm.