Decided to give a piston upper a try....... BCM lower with MOE grip, trigger guard & Stock from JN_FSU The upper is an Adams Arms Tactical Elite 14.5 with a pinned Surefire adapter. Upper has a two piece Sampson, removable lower section, Troy sights top it off. I do need to pick up some FDE ladder covers,....OD just isn't getting it done. Range time next week,...... Wanna kill these ads? We can help!