I have a vfc mk18 build with all custom internals. This gun started as a saber cqb but I changed out the rail and stock to make it a mk18. The parts include -Vfc saber body -Daniel defense mk18 rail -Emg crane stock -Knights armament qd suppressor Internals include -shs high torque motor -shs 13:1 high speed gears -g&g etu and trigger board -light weight full steel tooth piston -left side spur gear bearing switched out for bushing -perun etu programmable mosfet Stock hop up and bucking but has a action army 6.01 extended inner barrel, will accurately group .30s at 280 feet All work done professionally at a shop, the gun does have some wear and use is missing the mock bolt but has charging handle and dust cover. I have over 1600 dollars in this gun including tech costs so my loss is your gain. Will not ship only local pick up