The D&H .300 Blackout optimized magazine features high visibility badging for quick identification, a proprietary follower design and has been dimensionally adjusted to perform specifically with the full range of .300 Blackout rounds. The magazines also include a red follower for further distinguishing these magazines from others. These magazines have the internal rib positioned to improve function with a wider variety of projectiles in 300 AAC Blackout and with other .30 caliber AR rounds l