Magpul stock question

Decoy

http://www.ebairsoft.com/magpul-stock-black-p-2517.html

Looking for some info on this stock, does anyone know if this is a battery stock (as per crane stock) or are the side compartments just for storage?

Puding

from the ones i've seen just for storage/show, it would be possible to throw a lipo in the stock tube still, which is what i;ve seen most people do

its the real steel pts version on ebaybanned as far as i know, qwick check around gives a bit more information at wgc

- Airsoft Version of Adaptable Carbine / Storage Stock ( ACS )
- Designed to be a drop-in replacement for the standard M4 Stock
- Streamlined, anti-snag profile shields the release latch to prevent accidental activation
- Supplemental friction lock system eliminates wobble for enhanced stability and accuracy
- Sloping cheek weld provides a wide contact surface for user comfort
- Dual water resistant battery storage tubes ( each tube will store up to 3x CR123 or 2x AA batteries )
- Integral storage compartment with latching access door on right side
- Metal strike plate on toe of stock
- Rubber butt-pad comes as a standard component which gives shoulder purchase to prevent slippage
- 1 inch loop for sling mounting purpose