the dwell region 118 a of the cam lever slot 118 during a first portion of the forward travel of the bolt and the bolt carrier while the feed pin 108 is in the dwell region 118 a of the cam lever slot 118 the first and the second slide members 124 126 are stationary fig2 a and 25b thus the primary and the secondary feed pawls 128 130 remain stationary while the feed pin 108 is in the dwell region 118 a of the cam lever slot 118 as depicted in fig2 a and 25b a first round 114 a at a chambering position c 1 is chambered while the feed pin 108 is in the dwell region 118 a of the cam lever slot 118 the first round 114 a is now in a chambered position c 2 as depicted in fig2 b ready for being fired during the second portion of the forward travel of the bolt and the bolt carrier the feed pin 108 reaches the feed region 118 b of the cam lever slot 118 and travels from the second dwell position d 2 to a feed position f fig2 b as a result of the feed region 118 b being skewed with respect to the dwell region 118 a the cam lever 113 pivots from a static position s u2032 fig2 a to a displaced position d u2032 fig2 b as the feed pin 108 travels.