New upper build on old lower. Riflegear upper receiver and FA BCG, mid-length gas system, low profile gas block, Midwest Industries MCTAR-22 full length rail, Daniel Defense cold hammer forged 16" barrel, A2 flash hider, BCMGunfighter Mod.4 enhanced charging handle, Magpul MBUIS iron sights in FDE. Everything else remains the same as the old setup, minus the placement of a few things thanks to a longer rail.