I had a few lowers layin around a decited to knock one out. Kinda went lightweight but wanted to try a few things on a 556 ar so i sacrifised some weight savings.
complete basic upper reciever from local shop, oden 16.1 ultralight barrel and gas block, fail zero nib bolt carrier assembly and bolt, AXTS Raptor charging handle, and KX-5. Midwest Industries 15" mlok.
Franklin lower with SD-E, off brand grip,ati stock and JP SCS.
Got a chance to take out and put 300 rounds of tula 62gr hp and it functioned flawlessly. Shoots great and keeping iron sights on it to help work on my abilities. Total weight is 6lb 2oz so nothing impressive but lightest AR15 I have.