Built this custom HPA m4 had it for about a year. This thing is a beast shooting 45-50 rounds per second and can reach up to 250-300ft. Has an wolverine inferno in it with a gorilla fcu so is programmed on your phone. Has an r hoped barrel and maxx hop up. This also has an adjustable trigger so you can change the sensitivity in it. All in all it’s a great gun and work wonderful can’t complain about anything. Will accept tr@d Will accept offers as well Please text me if you have any questions at all