My latest project -
Started out as a JG MP5SD6. I gave the gearbox a basic cleanup and upgrade, new piston, silent head and nozzle, new bearings properly shimmed and greased, popped in a guarder high speed motor, a madbull tightbore, guarder rubber and H-nub, fixed the hop lever to lock in place once set. Cleared out the suppressor and refilled it with tool chest liner matting as it was just an echo chamber. Gives a really nice rof and range.
Externally I hated the folding stock, it kept retracting as I was aiming. Fitted an ICS M4 stock tube adaptor and sling mount with a nice light CAR15 stock. Might swap it out for a magpul CTS stock though.
Front grip is an ICS pro large handguard with a stubby foregrip and a nice big cree tac torch. Put an aimpoint sight on a low profile mount on top and its my goto CQB weapon.