This is the ProMag Taurus PT22 .22LR 8-round magazine. 

Welcome to one of the most durable magazine options for your Taurus PT22!

Constructed from heat-treated steel, you’ll never have to worry about taking it easy on these magazine(s). Inside, you’ll find a chrome silicon wire spring that is topped off by an injection-molded polymer follower that work in tandem to provide superior reliability. 

A side-facing reload assist tab minimizes the time and effort needed, while the witness channels allow you to keep track of your remaining rounds. Best of all, each magazine is made right here in the USA!   

At only eight rounds, you might as well add a few to the cart!