Allen-one said: I shot an AR that has a binary trigger on it last 12 months; Fostech was among the vendors at BDU's Epic Shoot and I shot just one in their demos. Changing the buffer spring with a regular carbine spring (minus three coils), along with the buffer by https://rarebreedtriggerfrt-1599752.liberty-blog.com/34856388/an-unbiased-view-of-rare-breed-trigger-frt