It's been some time since I've been here, soooo... Updates!!!
To start, here's how I'm currently running my MK18.
Also recently overhauled the gearbox, so the only things that are currently still G&G on this rifle are, the gearbox shell, trigger, bearings, buffer tube, stock and upper and lower receiver... Although, the upper and lower will be changed sometime after the holidays

Crazy hobby, eh.