Ok whats the big deal with putting an M4 stock on an AK? Why is this a cardinal sin? I have never handled an AK with an M4 stock but I would imagine its the same as putting one a M4 or CAR-15 I really like being able to use the stock on shorter settings for most things but all the way extended for prone and second to last notch out for off the bench. All the way closed for vehicle use, 2 clicks out for move and shoot drills also noticed that it made the AR extra handy in the deer blind. Why is so wrong to put one on another type weapon if it only increases the utility? Or is it that some people only care about looks over function? I am considering getting a PTR-91 with the M4 stock since the HK collapsible stock does not have any setting other than open or closed. Just have to find out if you can put an M93B on it.