2003 US Army BRADLEY GUNNERY 503p.pdf - Survival Books

FM 3-22.1Figure 2-1. M242 25-mm automatic gun.b. Cycles of Function. The 25-mm automatic gun has eight cycles of function thatrelate to the bolt position indicator (Figure 2-3, page 2-4). The BPI shows the crew wherethe bolt is located the whole time the gun moves through its eight cycles of function:(1) Sear or Charge Cycle. The 25-mm bolt is forward of its rearmost position. Thesear engages the master link. As a safety measure, the firing pin remains uncocked. Thebolt position arrow points to SEAR.Figure 2-2. Dual-feed system.2-2