Get a new one if you want but you will still have to learn to take them apart so you might as well fix the one you have. Rimfirecentral is helpful. It's pretty easy to figure out even without it though, it takes a little finese to get it tight, the nut on the back side fits into a recess, you have to back it out of that recess and turn it then put it in the recess and tighten the allen head bolt up, or something like that.
If you get the whole shabang apart you have to make sure the ramp and everything is lined up right when you put it all back again. Here's where it helps to have more than one, when it is lined up right the pieces fit together easy.
I know that's not really much help but I'm going from memory, rimfirecentral is a really great place though. It will help you turn that 10/22 into a real moneypit!!