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Questions & Answers
Customer Reviews
Most Recent Reviews
300 blackout magazine by Danny Montalvo, Verified Owner, September 17, 2025
I would recommend this product, it’s better than the one that came with my 300 blackout
Most Recent Reviews
Must have two of them by Courtjester69, Verified Owner, December 28, 2024
I had feeding issues. This mag solved my problem. Great mag for 300 blackout.
Most Recent Reviews
Must have two of them by Courtjester69, Verified Owner, December 23, 2024
Had a few feeding problems. It was resolved as soon as I started using the proper 300 Lancer Mag. Will definitely buy a few different colors.
Most Recent Reviews
If you own a 300 definitely get these Mags. by Courtjester69, Verified Owner, December 22, 2024
I had a problem feeding. Lancer magazine fixed fixed that problem right away Highly recommend this magazine.
Read All 4 Reviews
Color: Opaque Black Magazine Capacity: 30 RoundCaliber: .223 Remington , 5.56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Included Accessories: Standard Condition: New

Code: 7UD-RM-YTRTF-LCR999000428004-30RD

MPN: 999-000-4280-04

List: $27.99Save 25%
$20.99

Certain firearm magazines and extensions are subject to maximum capacity restrictions based on state and local laws. Currently, we are unable to sell these products to some locations. For a complete list of these restrictions, please visit our policy page.

By continuing with your purchase, you agree to adhere to all applicable laws and regulations.  

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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Lancer Systems L5AWM AR-15 .300 Blackout 30 Round Rifle Magazine

Specifically engineered for use with heavy subsonic .300 Blackout ammunition (200+ grain), the Lancer L5AWM 300BLK magazine features an updated internal geometry which allows longer heavier cartridges to stack properly, increasing feeding reliability when compared to a traditional .223/5.56 magazine. The outside of the mag body is molded with distinctive .300 Blackout markings and the magazine ships with a contrasting flat dark earth floor plate for easy visual identification.image

Specifications for Lancer Systems L5AWM AR-15 .300 Blackout 30 Round Rifle Magazine:

Manufacturer: Lancer Systems
Color: Opaque Black
Magazine Capacity: 30 Round
Caliber: 5.56x45mm NATO, .223 Remington
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Quantity: 1
Included Accessories: Standard
Condition: New
Country of Origin: USA

Package Content:

  • Lancer Systems L5AWM AR-15 .300 Blackout 30 Round Rifle Magazine

Lancer Systems L5AWM AR-15 .300 Blackout 30 Round Rifle Magazine Orderable Models

List of Orderable Models

  • Lancer Systems L5 Advanced Warfighter AR Rifle, .223 Remington, 5.56x45mm NATO, 30 Round Rifle Magazine, LCR999000428004 , MPN: 999-000-4280-04 , Code: 7UD-RM-YTRTF-LCR999000428004-30RD
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