AR-15 bolts and carriers decide how your rifle cycles under a 3-Gun stage's round count and ammunition variance. Competitors running suppressed or tuned gas systems rely on carriers with correct mass, proper gas key staking, and bolts built to survive sustained match fire. Options include lightweight and tungsten carriers, coated bolt carrier groups, and replacement bolts, matched to standard AR-15 and AR-pattern uppers and your buffer weight. Fast same-day shipping on most orders at Shooters Connection.