[DB19]

Originally Posted by swatt13

from m16 to m4!? i dont think you want to take that route. youll be really limiting your battery size capacity.

with the wiring out the back you can use a full stock or a crane stock, but either way a large battery.

with wireing out the front you really can only use a small battery unless you use a peq box or m4-s.

i would reconsider myself, but if thats what you want, you have to break down to the mechbox; remove the two body halves, remove pistol grip and motor, body pin, mag catch, slide the mechbox out.
next open the mechbox up, re-run the wireing from the back hole along the wire channels to the front wire hole, voila, done. sounds eays, but no its not, getting the mechbox back together will take you a while.... have fun!

As were my first thoughts. If you are content on doing this I would suggest taking it to a doctor. But as stated above a crane stock would be a good idear if you wanted a colapsable stock.