You should be able to mount the PRS, but you have to be careful which type of stock adapter you get:
The PRS stock does not slip over a standard buffer tube - it replaces the buffer tube completely. On an M4 AEG, you'd remove the buffer tube and receiver endcap, and screw the stock's tube directly to the receiver.
The PRS will not be compatible with an AK/M4 adapter like this:
http://www.evike.com/product_info.php?c ... dda0ff43a2But it will (or should) work with something like this:
http://www.evike.com/product_info.php?c ... dda0ff43a2You'll want to make sure the adapter has the short tube like the one I linked to. Some older-style ones will have a tube that's about 1/3 to 1/2 the length of a buffer tube, and you need it to be about 1/4 for the PRS to fit properly. These can usually be cut but there might be threads on the AK version since the screw is not going into the gearbox.
AirsoftFix will also be getting Black/Dark Earth/Foliage Green PRS stocks back in stock in late April. We only have Dark Earth in stock right now. We don't carry the M4/AK adapter so you'll have to snag that elseplace.
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