I like them a lot; don't know if it is still true, but they used to come with a fully adjustable rear site, along with front site, very cool, very few rimfires do nowadays- centerfires too for that matter.
they make a 25 or 30- round hi cap mag for it as well, very nice.
just get the metal mags, take apart the receiver, pull out the guide rods, and put them back in just finger tight, and just enough to be able to close up the back end. The major prob with jamming starts at the factory; they put the guide rods in too tight, and the bolt assy., binds up, because of the tight rods.
While you have the rods out, you could get some 0000 steel wool, and some of the new remmy oil, with VCI product in it, and really polish the heck out of those rods, so they are supersmooth.
next thing to do is improve the horrible trigger, then get a box of copper washed, hi speed 22 ammo, and run a brick of ammo through it, as fast as you can stand it. This will smooth up, and polish up, all the moving parts inside the receiver. you will now be very good to go.
If I got a newer one, and it did not have the sights on it; i would deff chop the bbl down to 16 inches, and thread it as well- but that's just me.