This is the ProMag AR-10 .308/7.62×51 10-round steel magazine.

When you’re shooting hard-hitting .308/7.62×51, your magazine must be as tough as possible. That’s where this 10-round magazine from ProMag comes in!

Featuring a heat-treated steel body with a black oxide finish, it doesn’t get more durable than this. Inside, an injection-molded polymer follower and chrome silicon wire spring keep every round perfectly aligned within the steel feed lips. 

Each magazine is made in the USA and backed by a lifetime warranty. What more could you ask for? 

Note: This magazine does not fit rifles that use the Armalite pattern magazines.

At only ten rounds a piece, you might as well order a few!