EDIT 4: I edited the front stock part to have a bevear tail thingy, the new file name is "stock front v3"
EDIT 3: I have added left and right split file for those of you that use routers (?).
EDIT 2: Ive widened (?) the slot/channel thingy for the buffer tube and fixed the beaver tail and applied these changes to the half-models.
EDIT: I've added files for the stock in 2 parts for those of you that have smaller printers. there are two registers between the parts for alignment and joint strength.

This is the Hera CQR stock for M-4/AR-15 pattern AEG airsoft rifles. The design is not 100% the same as the real-steel version as the pistol grip has to house the motor. The measurements for the interface are from the lancer tactical LT-12, this may not fit your gun exactly, however, it should fit most.

Butt-pads with different textures and desgins are coming soon!
Matching foregrip!
https://www.thingiverse.com/thing:2331717

ASSEMBLY:
-Remove the stock, motor, and pistol grip from your current gun. Set aside the screws used to secure the pistol grip to the gearbox, as well as the endcap/radiator for the motor, these will be used later.
-Slide the stock onto your gun's buffer tube, before it is slid completely on, route the motor wires through the holes in the grip-section.
-Once the stock is slid all the way down, use the screw you set aside earlier to affix the grip to the gearbox.
-Next insert the Body retaining pin (or a similarly-sized pin) into the hole near the base of the buffer tube.
-Insert the motor into the motor housing, attach the motor wires, and secure th motor in the housing with the endcap/radiator from the old pistol grip by screwing it into the holes at the bottom of the grip.
-Next slide the motor plate into the channel so that it looks like the pictures above.
-Slide the butt pad into it's registers in the back of the stock.
-Finally, insert 1/8 inch (3.175 mm) pins in to the holes marked with red circles.