AM Battlecat Slide Stock TM Hopup PDI 5.1 6.01tbb Maple Leaf 70* bucking AM BBU AM Nozzle AIP 120% recoil spring AIP 120% Hammer Spring SCS 125% Nozzle Spring SCS Shortstroke Kit X3 AM front fiber sights Stock Tm rear sight UAC outer barrel SCS 5.1 Spring Guide TM 5.1 Guide Rod