Just acquired one recently...it is not real well constructed, but it is not expensive either. I also own an M1 carbine so I was excited to get the rimfire version. I have to say it is fun to shoot...that is when I can get the darn thing to feed. I've tried a few different brands and I've come to the conclusion that the issue is with the plastic magazines and its fit. It is truly poorly made with many plastic parts but new out of the box, it aught to feed with some regularity...mine doesn't. Anyone else own one and what are your experiences? I don't know of any 3rd party magazines available..if it would feed, it is screaming for a 15 and 30 round magazine.