.22 LR magazines feed rifles, pistols and AR15 conversion kits. Rimfire rounds have rims that can snag on each other, so rimfire magazines are built with that in mind. Rotary magazines like the Ruger 10/22 design handle rims especially well.
Tips
Load rimfire magazines so each rim sits in front of the one below it. Keep them clean: .22 ammo is waxy and dirty and builds up fast.