In general, it's not advisable to go messing with anything original on your rifle just to add a higher round count. Nearly everyone discards the duckbill for stock at some point. If your rifle is a decent all numbers matching gun, you might consider another rifle to mess with instead. Double check your states regs, you might not even be able to order one. In Kali a detachable mag SKS is a felony. You can own them but not insert into a rifle or have a rifle capable of using them, i.e. a complete rifle with no stock fixed mag. PAX