Strike Industries MCCIRCLE Micro Threaded Compensator Black Steel 1/2"X28 Threads 0.64" OAL Compatible W/ 9mm/357 Sig The Circle Edition Pistol Compensator From The Strike Micro Threaded Comp Can Work With Just About Any Size Slide using a Threaded Barrel With 1/2"X28 Threads Per Inch. Si Internal Testing Has Typically Seen a Reduction Average Range (Dependent On Application) Of 8-15% In Felt Recoil. Made From AISI 1144 Steel Bead Blasted With Quench Polish Quench Process Finish, The Strike Micro Threaded Comp - Circle Is Small And Lightweight at Only a Total Length Of 16.3mm (0.64) While redirecting Gas For Recoil Reduction. Model: Micro Material: Steel Thread Pattern: 1/2"X28