I bought this off a good friend and he repainted it so I'm unsure it's brand. I put a lonex flat hop in it and bucking, a Prometheus tight bore barrel, and a Godzilla 5000 super high torque motor. Externally I have put a different more comfortable grip on it, it will also include the rail covers and grip. Acog and eotech you'd really have to twist my arm for, peq15 not included. Pm me for further questions. I'd trade for m14, scar, m16, m27. And no don't try trading me pistols.