CMMG THREAD ADAPTER PS90

Description

The FN PS90 runs a left-hand metric thread at the muzzle — M12x1.0 LH — that has no direct equivalent among the muzzle devices made for standard AR-pattern barrels. This adapter solves that problem cleanly: it threads onto the PS90 barrel’s existing muzzle and presents a standard 1/2″-28 right-hand thread on the other end, which is the pattern used by the overwhelming majority of suppressors, flash hiders, and compensators chambered for 5.7x28mm and similar small-bore cartridges. Without it, your muzzle device options are limited to the narrow field of products cut specifically for the PS90’s unconventional thread spec.

This is a purpose-built part, not a universal adapter that happens to fit. CMMG designed it specifically for use with their 10.4″ PS90 barrel, and the threading at both ends is machined to match the PS90’s factory spec on one side and the 1/2″-28 standard on the other. That means the interface is positive and repeatable — no wobble introduced between the barrel and whatever device you attach downstream. If you’re running a CMMG PS90 barrel and want to choose your own muzzle device rather than work around the factory thread, this is the direct path to doing that.

All CMMG products are backed by the company’s Lifetime Quality Guarantee.