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Discussion in 'Sold/Expired' started by zepheris.GLOCK, Dec 31, 2009.
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What is this for exactly. Got an M2 on order and plan on attaching it to my G19. Do I need this thing?
This part is the threaded piston part you switch out if you want to use it on a different threaded host.
This particular piston is threaded for 45ACP HK hosts.