Started with this. Made it to here so far. B5 Systems SOPMOD Bravo stock (selling) VLTOR MilSpec Receiver extension. LMT Heavy Carbine H buffer. LMT Carbine buffer spring. KNS LPK. Armalite castle nut and end plate. Geissele SD3G trigger. BADASS ambi safety. MagPul MOE + Grip. Now comes the upper. It will get... Young MFG N/M BCM Wilson 1/7 14.6" SS barrel (for now) with Wilson LoPro gas block. Wilson 13" T.R.I.M. rail. PRI Gas Buster CH. AAC muzzle break / QD. Spikes dust cover and forward assist.