The Lancer L5AWM .300 Blackout Magazine (MPN 999-000-4280-04) is a 30-round magazine specifically designed for heavy subsonic .300 Blackout ammunition, including 200+ grain projectiles.

Key Specifications

• Holds 30 rounds of .300 AAC Blackout.
• Updated internal geometry lets heavy subsonic 200+ grain projectiles stack properly for reliable feeding.
• Feeds more reliably with heavy subsonic loads than a traditional .223/5.56 magazine, per the manufacturer.
• Body is marked with distinctive .300 Blackout markings.
• Ships with a contrasting flat dark earth floor plate for easy visual identification.
• Finished in opaque black.
• Manufactured by Lancer Systems.
• Part of Lancer’s L5 Advanced Warfighter magazine lineup.
• Classified by Lancer as a Magazine.

Frequently Asked Questions

Does this work with standard 5.56 magazines? It’s purpose-built for .300 Blackout, especially heavy subsonic loads, with internal geometry a traditional .223/5.56 magazine doesn’t have.

How do I tell this apart from a 5.56 magazine? It’s marked with distinctive .300 Blackout markings and ships with a contrasting flat dark earth floor plate.

Buy the Lancer L5AWM 30-Round .300 Blackout Magazine, Opaque Black

Order from a Lubbock, TX gun shop on the Lancer L5AWM 30-Round .300 Blackout Magazine, Opaque Black from Lancer Systems, part of our AR Magazines selection. Feed heavy subsonic .300 Blackout loads reliably with this dedicated Lancer magazine.