Magpul115705384
Magpul PMAG M3 300 B Magazine AR-15 300 Blackout Polymer$14.30
Availability: In Stock
The Lancer L5AWM 20-round 300 Blackout AR-15 magazine brings serious durability to your platform without the weight penalty of traditional steel. Lancer engineered the L5AWM as a hybrid: a one-piece wrap-around steel feed lip assembly that won't bend or fail sits on a lightweight polymer body designed to withstand hard use in the field, at the range, or in duty roles. If you're building a 300 Blackout AR or running a 5.56 upper interchangeably, you want magazines that feed reliably and last through abuse—these deliver on both counts.
What sets the L5AWM apart is its internal geometry: a constant-curve design paired with a non-tilting follower keeps rounds stacked predictably and feeding smooth through every shot. The stainless steel spring resists corrosion, and the polymer body and components have been tested to withstand military-grade chemical exposure. The aggressive surface texture grips your hand or mag pouch even in wet conditions, and the opaque black finish hides any wear while staying practical in the field.
Lancer built the L5AWM for professionals and serious shooters who don't have time for mag failures. Whether you're running suppressed subsonic loads, pushing supersonic rounds downrange, or just stockpiling reliable hardware for your AR, this 20-rounder is a no-compromise choice that handles both duty and sport shooting. The 20-round capacity keeps things compact and legal everywhere in the US while holding enough rounds for realistic scenarios.
| Brand | Lancer |
| Model | L5AWM |
| Caliber | 300 Blackout / 5.56 NATO |
| Capacity | 20 rounds |
| Body Material | Opaque black polymer |
| Feed Lips | Hardened steel, one-piece wrap-around |
| Spring | Stainless steel |
| Follower | Non-tilting design |
| Compatibility | AR-15 platform |
Yes. The L5AWM is designed to feed both 300 Blackout and 5.56 NATO reliably, so you can swap uppers on the same lower without worrying about magazine compatibility.
The hardened steel feed lips resist deformation under pressure and hard handling, preventing the feeding failures that can occur when polymer lips bend or compress over time. The one-piece wrap-around design keeps them rigid and true.
Absolutely. The 20-round capacity balances magazine stack height with usable capacity for most hunting, sport shooting, and tactical scenarios. It's also standard capacity in all 50 states without legal concern.
Yes. The non-tilting follower and constant-curve geometry work reliably across the full spectrum of 300 Blackout loads—subsonic, supersonic, and everything in between.
SKU: 115796486 • Width: 3.4in • Height: 1.5in • Depth: 6.6in • Weight: 0.25oz
Availability: In Stock
The Lancer L5AWM 20-round 300 Blackout AR-15 magazine brings serious durability to your platform without the weight penalty of traditional steel. Lancer engineered the L5AWM as a hybrid: a one-piece wrap-around steel feed lip assembly that won't bend or fail sits on a lightweight polymer body designed to withstand hard use in the field, at the range, or in duty roles. If you're building a 300 Blackout AR or running a 5.56 upper interchangeably, you want magazines that feed reliably and last through abuse—these deliver on both counts.
What sets the L5AWM apart is its internal geometry: a constant-curve design paired with a non-tilting follower keeps rounds stacked predictably and feeding smooth through every shot. The stainless steel spring resists corrosion, and the polymer body and components have been tested to withstand military-grade chemical exposure. The aggressive surface texture grips your hand or mag pouch even in wet conditions, and the opaque black finish hides any wear while staying practical in the field.
Lancer built the L5AWM for professionals and serious shooters who don't have time for mag failures. Whether you're running suppressed subsonic loads, pushing supersonic rounds downrange, or just stockpiling reliable hardware for your AR, this 20-rounder is a no-compromise choice that handles both duty and sport shooting. The 20-round capacity keeps things compact and legal everywhere in the US while holding enough rounds for realistic scenarios.
| Brand | Lancer |
| Model | L5AWM |
| Caliber | 300 Blackout / 5.56 NATO |
| Capacity | 20 rounds |
| Body Material | Opaque black polymer |
| Feed Lips | Hardened steel, one-piece wrap-around |
| Spring | Stainless steel |
| Follower | Non-tilting design |
| Compatibility | AR-15 platform |
Yes. The L5AWM is designed to feed both 300 Blackout and 5.56 NATO reliably, so you can swap uppers on the same lower without worrying about magazine compatibility.
The hardened steel feed lips resist deformation under pressure and hard handling, preventing the feeding failures that can occur when polymer lips bend or compress over time. The one-piece wrap-around design keeps them rigid and true.
Absolutely. The 20-round capacity balances magazine stack height with usable capacity for most hunting, sport shooting, and tactical scenarios. It's also standard capacity in all 50 states without legal concern.
Yes. The non-tilting follower and constant-curve geometry work reliably across the full spectrum of 300 Blackout loads—subsonic, supersonic, and everything in between.
SKU: 115796486 • Width: 3.4in • Height: 1.5in • Depth: 6.6in • Weight: 0.25oz