ATAS™ inserts are for use with the Bowers Group Paradigm 5”, Paradigm 8”, USS .22 and the ASP .45 silencers as well as the AFH flash hider. See below for the list of inserts and specifications. Inserts offered individually for replacement or adding one to expand the adaptability of your Bowers Group silencer. ATAS M16X1LH – $35 HK USP Tactical .45, etc. ATAS M16X1RH – $35 HK MK23 SOCOM, Glock 21 Pro ATAS M13.5X1LH – $35 HK USP/9SD, SigArms 226 Tactical and more ATAS .578X28 – $35 Sig 220CT 40/45, FN FNP, FN FNX, best 1911 pitch ATAS 9/16X24 – $35 9/16 X 24 (.40 and AWC-threaded 1911 barrels) ATAS 5/8X24 – $35 General utility pitch ATAS 1⁄2X28 – $35 1⁄2 X 28 (most 9mm and smaller calibers) M&P15-22 ATAS 1⁄2X20 – $35 1⁄2 X 20 Beretta M-71, CZ 452, Tec 22’s and any 22 pistol or rifle threaded 1/2 x 20 ATAS P22 – $35 Barrel nut on P22, M&P22, Colt/Umarex 1911/22s, PPK/S .22 ATAS Mosquito – $35 Factory threaded Sig Mosquito & P226/22 ATAS GSG1911 – $35 GSG and Sig 1911/22s