This is the CPD Duramag AR-10, SR-25 6.5 Creedmoor 20-round magazine. 

Maximize your capacity and durability with these ultra-tough 20-round magazines from DURAMAG! 

When you’re shooting hard-hitting calibers such as 6.5 Creedmoor, you need to be able to rely on your magazine(s) more than ever. Protected with a T-360 applied coating, these laser-welded 410 stainless steel magazines can handle any task in any conditions. 

Keeping them running reliably is an Advanced Geometry Follower and an EverFlex anti-fatigue spring, allowing you to count on them when you need them the most. From the range to defending your home, these 20-round magazines from DURAMAG will have your back! 

Stock up while you can! These are sure to sell quickly!