This is the Lancer L7AWM GEN 2 AR-10 .308/7.62×51 20-round magazine. 

If you’ve been looking for a battle-ready magazine for your AR-10, look no further! 

Featuring a lightweight polymer body with hardened steel feed lips, the L7AWM delivers superior durability without weighing down your rifle. Inside, you’ll find an anti-tilt polymer follower and stainless steel spring, which keep every round perfectly aligned and feeding flawlessly. 

A switchable drain lock in the floor plate finishes off the magazine perfectly, further adding to its toughness. From shooting in the desert to the tundra, this magazine is ready to perform.

Grab a couple of these 20-round magazines and get ready to hit the range!