Lancer AR-15 MAGAZINE - 300 BLK - 10 ROUND CAPACITY - 30 ROUND BODY - Black
Lancer Systems
$27.69
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Lancer Systems
Lancer AR-15 MAGAZINE - 300 BLK - 10 ROUND CAPACITY - 30 ROUND BODY - Black
The Lancer Systems L5AWM 300 Blackout 10-Round Magazine delivers purpose-built reliability for AR-15 shooters who demand consistent feeding with heavy subsonic ammunition — all in a California-compliant, 10-round-capacity package housed in a familiar 30-round body.
- Optimized internal geometry ensures reliable feeding with 200gr+ subsonic .300 Blackout rounds
- California-compliant 10-round capacity in a standard 30-round profile body
- Distinctive .300 Blackout markings prevent dangerous mix-ups with 5.56 magazines
- Flat Dark Earth floor plate provides instant visual identification at a glance
- Durable polymer construction with steel feed lips for long-term dependability
- Drop-free design compatible with standard AR-15 lower receivers
Who This Is For
This magazine is an excellent choice for California-based AR-15 owners running a .300 Blackout upper, particularly those who favor heavy subsonic loads for suppressed shooting, hunting, or home defense. It's also ideal for competitors and range shooters who want a dedicated, clearly marked magazine that eliminates the risk of feeding the wrong ammunition — while staying fully compliant with California's magazine capacity restrictions.
Specifications
| Brand | Lancer Systems |
|---|---|
| Model | L5AWM 300BLK |
| Caliber | .300 Blackout |
| Capacity | 10 Rounds (30-Round Body) |
| Color | Black with Flat Dark Earth Floor Plate |
| Construction | Reinforced Polymer / Steel Feed Lips |
| Compatibility | Standard AR-15 Lower Receivers |
| Compliance | California-Legal (10-Round Limit) |
| Markings | Distinctive .300 Blackout Engraving |
Frequently Asked Questions
Why do I need a dedicated .300 Blackout magazine instead of using a standard 5.56 mag?
While .300 Blackout ammunition can physically fit in a standard .223/5.56 magazine, heavy subsonic loads — particularly those with 200gr and heavier projectiles — have a longer overall cartridge length that can cause feeding issues with standard magazine geometry. The Lancer L5AWM 300BLK features an updated internal profile specifically engineered to stack and feed these longer rounds reliably, reducing the risk of malfunctions. The dedicated .300 BLK markings also help prevent the serious safety hazard of accidentally chambering the wrong caliber.
Is this magazine blocked to 10 rounds permanently, or can it be restored to 30-round capacity?
This magazine ships as a California-compliant, blocked 10-round magazine intended for sale and use within California. It is sold in its restricted configuration to meet California state law requirements. Goodland Guns sells this product specifically for California customers, and it should be used in accordance with all applicable state and local laws.
Will this magazine work with both supersonic and subsonic .300 Blackout loads?
Yes. While the L5AWM 300BLK is specifically optimized for heavy subsonic ammunition (200gr+), its updated internal geometry also functions reliably with standard supersonic .300 Blackout loads. This makes it a versatile, go-to magazine whether you're running suppressed subsonic loads at the range or lighter supersonic hunting rounds.
- Caliber:
- 300 BLK
- Capacity:
- 10/30 Round
- Color:
- Black
- Type:
- Rifle Magazine
- CA Compliant:
- Yes
- Platform:
- AR-15
- Material:
- Polymer