Lantac UAR upper receiver with smooth cam pin included. - $150.
SLR rifleworks Ion Lite 9.7" MLOK rail. MLOK sections all around and picatinny rail extended down top rail section. perfect length to come right up to muzzle device on a 10.5" barrel. And to allow suppressor to fit real close to rail if that is your intention. - $180.
Larue Tactical LT751 micro red dot mount. Was used with an Aimpoint T2 but will work on micro red dot with same mounting pattern. - $85.
KAK shockwave and KAK shockwave buffer tube. - $60.
BCM MOD4 charging handle. - $30.
Rosco manufacturing 10.5" 5.56 barrel. Around 350 rounds down the pipe, all brass factory ammo. - $100.