18mm and Larger Conversion Adapters

Convert your 14mm x 1 RH (select SKS, SA VZ-58, and Century VZ208) barrel threads to 1/2"-28 RH with this premium stainless steel thread adapter from Infinite Product Solutions! Compatible with both rifle and pistol threads, this is the perfect solution...

Convert your 13mm x 1 LH (Steyr AUG .223 /5.56) barrel threads to 1/2"-28 RH with this premium stainless steel thread adapter from Infinite Product Solutions! Compatible with both rifle and pistol threads, this is the perfect solution for this particular...

Convert your 13mm x 1 RH (Older Galil [.223, 5.56, .308, 7.62x39] and Arsenal Strike One) barrel threads to 1/2"-28 RH with this premium stainless steel thread adapter from Infinite Product Solutions! Compatible with both rifle and pistol threads, this...

Convert your Sig Sauer and Glock 9mm (left handed) 9mm barrels to your .223 (5.56), 9mm, or .22 accessories with this 13.5mm x 1 LH thread adapter! Made out of black oxidized steel, this is the perfect solution for this specific accessory adaptation!...

Convert your Sig Sauer and Glock 9mm (left handed) 9mm barrels to your .223 (5.56), 9mm, or .22 accessories with this 13.5mm x 1 LH to 1/2-28 thread adapter! Made out of black oxidized steel, this is the perfect solution for this specific accessory...

Extend your internal Walther P22, Walther PPK/S, M&P 22, Colt/Umarex 1911 A1, and Colt Gold Trophy .22 barrel threads to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices, supressors, or cleaning adapters. This high...

Extend your Sig 1911 (.22LR) and  GSG 1911 (.22LR) barrel threads to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices, supressors, or cleaning adapters. This high quality adapter features a durable black...

Convert your Sig Mosquito (.22) barrel thread to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices, supressors, or cleaning adapters. This high quality adapter features a durable black oxide steel construction...

Extend your internal Walther P22 (standard 3.4" barrel model only), Walther PPK/S, M&P 22, Colt/Umarex 1911 A1, and Colt Gold Trophy .22 barrel threads to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices,...