Super V Recoil Mitigation System. Toolless caliber interchangeability. For Glock magazine compatible. M4 stock adaptor with fixed Defiance M4 stock. Smooth pivoting trigger with audible and tactile reset. Ambidextrous short throw safety lever. 4-pin toolless disassembly. Low-profile folding sights, full length picatinny top rail, lower picatinny accessory rail and a For Glock magazine. All NFA Rules Apply.