Posted September 27, 2018 10:28 am by Comments

By Patrick Roberts

Fn 509 Comp

Fn 509 CompAfter the introduction of the FN 509 Tactical, Parker Mountain Machine filled the need for a compensator that matches the contour of the slide. The new comp doesn’t use set screws like many other compensators on the market. Instead, the PMM FN 509 comp relies on shims to time the comp against the shoulder of the barrel. When the comp is installed… more …Read the Rest

Source:: Recoil

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