OPS INC™ SPR Brake and Collar Kit

OPS INC™ Brake and collar kit for brake mounted suppressors, also known as the “SPR Kit”.

Included with the kit:

Your choice of brake:

-1/2-28 Brake with .22/5.56 caliber aperture. SHORT external thread extension can be used with either a crush washer or spacer/shims. This is the MK12 “clone correct” version.

-1/2-28 Brake with .22/5.56 caliber aperture. LONG external thread extension for use with shims only.

-5/8-24 Brake with .30 caliber aperture. LONG external thread extension for use with shims only.

For more information about brakes and thread lengths, click here.

Thread protector

Shim kit

Your choice of SPR collar

–MOD 0 (short collar to be used with MK12 MOD 0 with PRI flip up front sight)

–MOD 1 (long collar to be used with MK12 MOD 1, MK12 MOD H, or any rifle with sufficient clearance behind the step in the barrel.)

–MOD 1B (allows any SPR cut barrel to host a B length can like the AEM2, AEM3, AEM4)

–Daniel Defense (Same internal dimensions as a standard MOD 1, external taper is moved back for use with Daniel Defense MK12)

-Centurion MOD 0, MOD 1 (both have the same external dimensions but a slightly larger internal diameter to work with barrels produced before November 2024)