I got my mk2 and I love it, the only thing I really want to change is the cocking lever to a short throw, I know its not a new rifle anymore and parts are not as common as the new ones, I read earnest used to sell them but I can't find them anywhere, and I was wondering if I just look for a used m3 short throw lever can I just take out the one on my mk2 and throw in the m3 one without having to buy the whole 160dllr ambidextrous kit???