Silencers and Accessories | Home articles  |  contact us <-Back AAC Blackout 51-tooth M4-2000 Blackout Ratchet Fast-Attach Mount. For use with M4-2000 mod 07/08 and 416-SD suppressors. .5x28 tpi. .5x28 15mm HK  thread $99.00 Temporarily Out of Stock © PoliteSocietyInc.com. All Rights Reserved.