My penultimate AR build
5.56 18" 1-7 twist DD barrel, GTO billet lower, AR15.com billet upper, SLR adjustable gas block, Noveske NSR 16.7" rail, AAC Ranger II can, Timney 3.5 trigger, Young NM BCG, BMC charging handle & mil spec car tube, assorted Magpul, Leupold 4.5x15 TT scope on Bobro mount.
*one more to go and it's going to be 6.5 Grendal