The only reason I'm not jumping to get the pdw stock designed for the mp5 is the price, and the fact the pdw stock designed for the mp5k can be had for half the price. Okay well say instead of hacking away at the body, what if I used something between the stock and the body, to act as a coupler of sort? I have a retractable stock at my disposal. From the pictures I've seen of the stock's connection it seems like I would have to drill out 2 rectangular holes in the piece the attaches the retractable stock to the body to accommodate the two points of attachment. Any ideas?