AR-15 recoil systems control bolt carrier velocity and buffer behavior in Multigun and 3-Gun rifles, where flat recoil keeps the dot or reticle tracking through fast strings. Tuning buffer mass and spring rate to your gas setup, barrel length, and ammunition removes bolt bounce and smooths the cycle. Product types include carbine and rifle buffers, heavy and adjustable buffers, and recoil springs, in standard AR-15 and AR-pattern buffer tube fitment. Fast same-day shipping on most orders at Shooters Connection.