The cerekoted one is a mega upper and lower, 10.5 faxon barrel 1-8 twist 300b/o, slr hand guard and adjustable gas block. Silencerco brake (omega will thread over), primary arms 1-6 illuminated, raptor charging handle, fail Zero bcg, geissele 2 stage, ctr, magpul qd asap, ergo grip at the moment. Th...