Optimized for reliable service with the powerful .300 AAC Blackout cartridge, the D&H® AR-15 300 AAC Blackout 20-Round Aluminum Magazine features a heat-treated aircraft aluminum body with caliber-engineered feed lips and ribbing. The black Teflon coating offers superior corrosion-resistant protection, while the 17-7PH spring and D&H proprietary red limited tilt follower ensure smooth operation. Precision-machined magazine catch windows deliver a snug, reliable fit for wobble-free performance and reliable feeding.