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hk91 suppressor 762-sdn-6

  1. HK NFA TALK
    I want to use an AAC 762-SDN-6 suppressor in my HK91 but want to do so if it's been done before and can be done without negatively affecting the rifle. I have read that one of the things to do is to use an HK #17 36 degree locking piece in order to cope with the greater back pressure brought...
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