While using my friend's KWA SR-10, I dropped it on the ground and the plastic piece holding the butt-plate on broke off. We were able to secure it with some electrical tape and duct tape, but I offered to replace it for him. I can't just buy him a new butt-plate as it's the entire piece almost so right now I am looking at replacing the crane stock and was wondering if I needed to go KWA or if I could buy just any crane stock for an M4/M16 and use that for his SR-10. Evike right now has a couple of them but the only issue I have is if they'd fit. Thanks in advance.