Had one of those. It was a fun gun but finicky about what you fed it. Liked to be run wet.
I could take mine apart but it was not something done casually. Numrich has a parts diagram that helps. Basically take the action out of the stock, one screw and the barrel band. Remove the recoil spring guide rod and springs. Laying it on its side, remove two pins and a screw, or maybe two screws and a pin. Left up the back of the receiver cover, carefully. The op rod will come with it. The bolt, recoil spring, and firing pin assembly sit on top of the trigger guard and can be lifted from the trigger guard. GO NO FARTHER. There are all sorts of little springs in the trigger group, the sear spring has a nasty habit of falling out.
It isn't too difficult but you need go slow and make sure parts don't disappear.
Sold mine years ago when I got a real carbine. I don't miss it. The magazine feed lips are rather sharp. An afternoon's shooting could get painful.