This mp5 has been extensively modded over the last 8 months. Exterior mods: Front sight shaved Rear sight shaved Custom cut keymod hand guard Custom top rail Sd suppressor has been chopped but retains its "qd" function Cheap magwell side sling mount deleted Gearbox Avalon quick change gearbox Gate titan Stock vfc gears Shs dsg gear Cut 170 spring Shs piston (rack has been epoxied in) Classic army cnc high torque high speed motor Gun runs 42 rps max @1 joule with .30 bb I built it for milsims it's super battery efficient and I run a 3s butterfly pack in the hand guard. Would consider selling as shell.