The Tiger Rock Inc. ST009M+ST003M AR 9mm 6 Position Stock Kit delivers unparalleled versatility and performance for your firearm. Crafted to enhance your shooting experience, this all-in-one kit features quality components ideal for both gun enthusiasts and professionals alike. AR-15 Stock Buffer Tube - Mil-Spec AR-15 Buffer Castle Nut Stock Buffer End Plate AR-15 Carbine Length Buffer Spring - Stainless Steel 7 oz Bolt Buffer AR 9mm - Stainless Steel AR-15 T6 Collapsible Standard Version Stock Body - Mil-Spec Transform your AR 9mm setup and enjoy enhanced functionality and comfort on the range.