This is an Armalite AR-10 magazine with a 5-round capacity. This magazine will work with Gen 2 Series-B Armalite AR-10 rifles.
From the inventors of the AR-10, Armalite Gen 2 magazines are the only option when you want the best for your rifle.
Made in the USA from lightweight aluminum, these magazines offer an ideal balance between weight and durability. Type 17-7 stainless steel springs increase service life, and the hard-anodized finish will shrug off even the harshest operating conditions. Ready to run in rain, sleet or snow, these magazines are the toughest, most reliable available for your AR-10.