Help! Grendel Rifle not running

[ricsmall]

if im not mistaken, some of the guys on here talk about needing a heavy buffer if you are running a car length gas system. also, you may want to check into an adjustable gas block with the car gas system. maybe some of the veterans will chime in. in the meantime, you could try a search on this forum, the search engine works pretty good on here for specific topics. good luck, and keep us posted.