The BLACKSIDE-45 is currently available threaded either M16x1-LH for the HK USP Tactical, M16x1-RH for the MK23/SOCOM, and 0.578-28 for the Glock 21, 1911, and other barrels. The recoil boosted (L.I.D.) version is currently available threaded 0.578-28 and M16x1-LH for the USP Tactical, M16x1-RH for the Mk23 SOCOM, and 9/16-24 for use with handguns chambered in .40 S&W. Extra pistons to allow a change of threading may be ordered separately for $135. (Order Here)
** NOTE: Although the Sig P220 Combat TB model with factory threaded barrel is threaded 0.578-28, it has shorter barrel threads than a standard 1911(0.375" vs. 0.450" OAL). Be sure to specify if you are using a Sig P220 Combat when ordering.
Caliber: .45ACP, .40S&W
Sound Reduction: 29 dB
Materials: 7075 Aluminum & Stainless Steel
Finish: Matte Black Cerakote with Reduced Visual-IR Signature
Mounts: .578-28, .578-28 SIG, 1/2-28, 16x1 RH-M OR M16X1 LH-M; 9/16-24 or M14.5x1