AR15 C-Crane lipo stock

Hi, this c-crane stock can fit multiple lipo batteries, like nunchuck 7.4 and 11.1v batteries. it can fit up to 3 batteries. The dimensions of the two side battery compartments are 118x24x21mm for nunchuck lipo batteries, then you got the buffer tube compartment for longer batteries. Instructions and Bom in the pictures, Enjoy. Use at least a 35-40mm M3 bolt.