Enhance your shooting experience with the Lancer Systems 999-000-4280-04 magazine, crafted for superior performance with heavy subsonic .300 Blackout ammunition. This precision-engineered L5AWM magazine accommodates 200+ grain projectiles, ensuring optimal stacking and feeding reliability unlike traditional magazines. Optimized for 200gr+ Subsonic .300 Blackout Updated Internal Magazine Geometry Distinctive .300 Blackout Markings Flat Dark Earth Floor Plate for ID Elevate your firearm's capability with this reliable .300 Blackout magazine.