i believe these were made by heritage but i cant be sure since i cant find anything on them i have had mine for a couple years and recently purchased a .22 mag cylinder from my brother in law for 15 bucks it drops in fine everything locks up tight and lines up right but my question is, is it safe to shoot the mags through this old pistol? i cant find anything to state that it isn't but i'm trying to find out for sure before i fire it. thanks for any help i can get