Attachment 258169Attachment 258169I've been working on upgrades for this rifle for quite a while and I think I finally got it where I want it. Options include Magpul adjustable stock, Geissele two stage DM trigger, Raptor ambi operating handle, Apex forearm, Black Rain adjustable gas block, Surefire muzzle brake, JP captured buffer spring and Tungsten/Armor Black Cerakote paint by Sand Mountain Armory. The rifle had a bit of an issue with short cycling using certain types of ammo, but the adjustable gas block combined with the JP spring system cleaned that up.