The L5AWM 300BLK magazine has been specifically designed for use with heavy subsonic .300 Blackout ammunition, especially with 200+ grain projectiles. Its updated internal magazine geometry allows these longer, heavier bullets to stack properly, enhancing feeding reliability compared to a traditional .223/5.56 magazine.Key FeaturesCapacity: Holds 30 rounds of .300 AAC Blackout ammunition.Distinctive Markings: The magazine body features distinctive .300 Blackout markings for easy identification.Included Floor Plate: Ships with a contrasting flat dark earth floor plate for visual identification.