ZEV Technologies Glock springs — recoil, trigger, and magazine — are rated for competition round counts with consistent weight across the spring's service life. Recoil spring weights are available in competition-tuned ratings for both standard and compensated Open guns, allowing recoil management tuning without changing your ammunition. Trigger return and striker springs are sized to maintain primer ignition reliability while reducing overall trigger weight. Fast same-day shipping on most orders at Shooters Connection.