Firearm owners can employ adapters designed for FTN Comstock style 1.5×8 threads. These adapters utilize a 1/2×28 to 3/4×16 thread converter suitable for 22, 9mm, and 556/223 calibers. Alternatively they utilize a 5/8×24 to 13/16×16 converter for 300 Blackout and other applications. The adapters themselves are linked within the read me file.