Evike.com e90 which has had the battery upgraded to a 9.6v which has increased the ROF. Haven't had it measured yet. I've added a vertical folding fore grip which has worked great so far. I had added a red/green dot sight to it which gave it a better look not all that useful lol. I also bought a double stack magazine clip which holds to magazines together for a quick and easy reload. Well that's it for right now. Next upgrade will be a flashlight with pressure switch.