Description
The Yankee Hill Machine Mini QD Brake is a muzzle brake for 9MM, threaded 5/8-24.
A muzzle brake redirects escaping gas sideways and rearwards to push back against recoil and muzzle rise. The gas it redirects has to go somewhere, so a brake makes the rifle louder and sharper for anyone standing beside it.
This device also serves as a quick-detach suppressor mount, so the can locks onto it rather than threading directly to the barrel.
This part is threaded 5/8-24, which is the usual thread on .30 calibre barrels. Thread pitch has to match exactly – a near miss either will not start or will cross-thread, and a damaged barrel thread is a gunsmithing job.
A muzzle device fitted to bring a short barrel up to the legal 16 inches only counts if it is permanently attached – pinned and welded, or silver-soldered. Simply screwing one on does not change the barrel's measured length.
This is a part, not a regulated item. Mounts, pistons, caps and muzzle devices are not NFA-controlled and ship directly to your address – the suppressor itself is the registered item.
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