Ammunition Storage Components AR-15 6.8 SPC Stainless Steel Magazine, 25 Round Blocked to 10 Round. Constructed from 410 Series Stainless Steel that has been heat treated and finished with a black oxide coating on the floor plate for corrosion resistance. Features a Chrome Silicon spring and an anti-tilt gray follower with PTFE. Capacity is 10 rounds. Caliber is 6.8mm Remington SPC. Color is Black Marlube with Grey Follower. Compatible with AR-15 platform.