Fits all firearms equipped with a mil-spec buffer tube: AR-15 pattern, MPX, Glock, CZ Scorpion Evo 3, HK9X pattern, etc. Adjustable Side quick disconnect for sling attachment on either side Quick and easy to install. Provides additional support during firing. Weighs a scant 4.0 ounces. Firearm shown not included It is the responsibility of the consumer to ensure that their use of the Shockwave Blade complies with all NFA laws and regulations. KAK Industry cannot provide any legal advice or interpretation of ATF rules and regulations. Please refer to the ATF website to determine if your use of the Shockwave Blade is controlled by the NFA or other regulations. ATF Information on Pistol Braces