KAK SHOCKWAVE PACKAGE - BROWN INCLUDES SHOCKWAVE BLADE PISTOL STABILIZER - BROWN KAK SHOCKWAVE TUBE CASTLE NUT MIL-SPEC ENDPLATE CARBINE BUFFER SPRING STANDARD CARBINE BUFFER EVERYTHING YOU NEED TO INSTALL THE SHOCKWAVE SYSTEM 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