CC9-specific rail-mounted compensator that works with the factory non-threaded barrel.

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The HK Parts MOD 1 is a CC9-specific compensator that clamps to the pistol without requiring a threaded barrel. It is CNC-machined in the United States from billet aluminum and includes a rail insert for a light or laser plus a smooth delete plate. The unit measures 2 inches long and weighs 2.85 ounces.
HK Parts specifies 20 inch-pounds on the bottom screw and 18 inch-pounds on the side screw. The company recommends breaking in the recoil spring for at least 200 rounds before installation and using 124-grain or heavier 9mm ammunition. Those requirements make it a range-control upgrade rather than a zero-compromise carry addition, and its added length requires a holster cut for the MOD 1 profile.
Add the HK Parts MOD 1 Compensator for HK CC9 to your build and see how it enhances your platform.