There is some little tread combo thing. On one end there is wood tread, and on the other end there is a metric or inch tread. So you could have the butt cap mounted with a metric or inch screw when you like it pistolstyle, and mount the shoulderstock when you like it riflestyle. That way, you dont wear out the woodtreads. Then its just the making of a nice shoulderstock, that look autentic.You have to find some autentic pictures.