This is a ADCO Mag Loader/Unloader known as the Super Thumb chambered in 22 LR, model ST4.
Reloading magazines takes a lot of cheer out of a day of shooting fun. With the ADCO Super Thumb Loader" you should be in good shape but you might need to bring a little extra ammo so you don't run out.
Features:
Accepts Extended Capacity Ruger 10/22 Magazines
Easier & Faster Reloading
