Lancer Systems L5 AWM Advanced Warfighter Magazine AR-15 300 AAC Blackout Polymer

The Lancer Systems L5 AWM Advanced Warfighter Magazine for AR-15 .300 AAC Blackout is engineered specifically for shooters running heavy subsonic ammunition in their modern sporting rifles. Unlike standard .223/5.56 magazines, this .300 Blackout magazine features updated internal geometry designed to handle 200-grain and heavier projectiles, solving the stacking and feeding problems that plague generic AR magazines when you're pushing subsonic loads. If you're serious about running subs in your AR, this magazine eliminates the guesswork and reliability hiccups that come with adapting standard 5.56 mags.

Built from durable polymer construction, the L5 AWM maintains the ruggedness you expect from Lancer's field-proven design. The magazine body is molded with clear .300 Blackout markings so there's no confusion in your kit, and it ships with a contrasting flat dark earth floor plate for quick visual ID whether you're sorting mags at the bench or running a tactical course.

Worth noting: this magazine is optimized for the heavier subsonic realm. If you're shooting lighter supersonic .300 Blackout loads under 150 grains, a standard .223/5.56 L5AWM will handle the job just fine. This one is your answer when you've committed to heavy, slow-moving projectiles and want a magazine that actually cycles them reliably.

Key Features

• Internal geometry optimized for 200+ grain subsonic .300 Blackout ammunition
• Improved feeding and stacking reliability compared to standard AR-15 magazines
• Durable polymer construction proven in field use
• Molded .300 Blackout markings for easy magazine identification
• Flat dark earth floor plate included for visual distinction

Specifications

Frequently Asked Questions

Will this magazine work with supersonic .300 Blackout ammo?

This magazine is specifically engineered for heavy subsonic .300 Blackout ammunition. If you're shooting lighter supersonic loads under 150 grains, Lancer recommends using a standard .223/5.56 L5AWM magazine instead.

What's the difference between this and a regular AR-15 magazine?

The L5 AWM for .300 Blackout features updated internal geometry that properly staggers and feeds longer, heavier subsonic projectiles. Standard .223/5.56 magazines can experience stacking and feeding problems with 200+ grain .300 Blackout rounds; this magazine eliminates those reliability issues.

What color is the floor plate?

The magazine ships with a flat dark earth floor plate, which contrasts visually with the magazine body for easy identification in your kit.

What AR platform does this fit?

This is an AR-15 magazine chambered for .300 AAC Blackout.