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aac tirant o-ring

  1. HK NFA TALK
    Hey all, Not much of a poster here, but have lurked for some time. I finally have my AAC TiRant 45 on my USP 45 Tactical, and I noticed that when threading the suppressor onto the barrel resulted in the O-rings in the piston getting eaten up. I used some extra O-rings I have for my barrel to...
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