*300 BLACKOUT VARIANT*
Lancer Systems L5AWM® 300 Blackout Advanced Warfighter Magazine - 30-Round Capacity, Hardened Steel Feed Lips, Hybrid Polymer Body, Internal Geometry Optimized for Subsonic & Supersonic .300 BLK Projectiles, Translucent Smoke Finish - 999-000-4280-01 / 738435619466
Product Description
Feeding long, heavy subsonic bullets (such as 200gr to 220gr projectiles) or aggressive supersonic loads in a .300 AAC Blackout rifle requires a magazine engineered specifically for the caliber's unique shoulder geometry. Standard 5.56 NATO magazines feature internal ribbing designed for smaller .223 projectiles; when loaded with heavy .300 BLK rounds, those ribs press against the wider projectile shoulders, causing binding, nose-diving, and severe feed ramp jams on your bench. The **Lancer Systems® L5AWM® 300 Blackout Translucent Smoke Magazine (999-000-4280-01 / 738435619466)** flatlines these feed limitations, combining a modified internal guide geometry with Lancer's hybrid steel-and-polymer architecture.
Proudly designed, engineered, and manufactured in Quakertown, Pennsylvania by Lancer Systems, the L5AWM 300 BLK magazine pairs an impact-resistant **translucent smoke polymer body** with **one-piece wrap-around hardened steel feed lips**. The steel feed lips are permanently molded into the polymer body to prevent spreading, feed lip deformation under drop impact, or cracking during long-term fully loaded storage. Purpose-built for the caliber, the internal geometry accommodates heavy subsonic projectiles up to 220 grains without cartridge binding. Featuring a contrast flat dark earth (FDE) floorplate for instant visual caliber identification, this hybrid 30-round magazine optimizes your .300 BLK rifle build straight from your armorer bench.
Engineered to lock cleanly into standard MIL-SPEC AR-15 magazine wells and custom lower receivers, this factory-calibrated 300 BLK magazine guarantees reliable cartridge presentation directly from your workspace bench.
*Armorer Bench Notes & Real-World .300 BLK Staging Guidance: The Lancer 999-000-4280-01 magazine arrives workspace ready as a pre-assembled 30-round hybrid feeding unit. CALIBER & SUBSONIC / SUPERSONIC FEEDING MATRIX: This magazine is engineered natively and strictly for **.300 AAC Blackout (.300 BLK / 7.62x35mm)** ammunition. *Visual Caliber Identification Checklist:* Features distinct exterior caliber roll-marks and a factory **FDE bottom floorplate** to prevent dangerous cross-loading of .300 BLK into 5.56mm chambers. Armorer Workbench Custom Staging Sequence: 1. Visually and physically confirm your host .300 BLK rifle is completely clear of live ammunition, the magazine is removed, and the chamber is checked safe and empty. 2. Inspect the steel feed lips and non-tilt follower to ensure no transit debris or oil obstructs vertical travel. 3. Load up to 30 rounds of supersonic (110gr-125gr) or heavy subsonic (190gr-220gr) .300 BLK cartridges into the staggered column. 4. Verify round counts at a glance through the translucent smoke polymer body walls. 5. Insert the loaded magazine into the upper receiver until the magazine catch locks with a distinct metallic click. 6. Cycle the bolt carrier manually to verify smooth, uninhibited cartridge pickup over the barrel extension feed ramps before rolling downrange.*
Key Features
- Engineered Specifically for .300 Blackout: Modified internal guide geometry and side-ribbing prevent heavy subsonic (200+ grain) projectiles from binding or nose-diving.
- Hardened Steel Wrap-Around Feed Lips: One-piece steel feed lip assembly is permanently molded into the body, eliminating lip spreading or deformation under heavy drop impacts.
- Impact-Resistant Translucent Smoke Body: High-strength polymer body allows instant visual confirmation of remaining round counts, brass type, and projectile seating depth.
- FDE Floorplate for Caliber Identification: Features a Flat Dark Earth baseplate to provide clear visual separation between 5.56 NATO and .300 BLK magazines on your bench.
- Non-Tilt Polymer Follower & Steel Spring: Outfitted with an aggressive non-tilt follower driven by a stainless steel spring to maintain uniform upward pressure under rapid fire.
- Aggressive Exterior Texturing: Raised side ribs and aggressive surface texturing ensure positive, non-slip mag changes in wet weather or while wearing tactical gloves.
Product Specifications
- Brand: Lancer Systems® (Quakertown, PA / Made in the USA)
- Model Line: L5AWM® (Advanced Warfighter Magazine) Series - 300 BLK
- MPN/SKU Code: 999-000-4280-01 (L5AWM 300BLK 30rd Translucent Smoke SKU)
- UPC Code Profile: 738435619466
- Caliber Action Standardization: .300 AAC Blackout (.300 BLK / 7.62x35mm)
- Magazine Capacity Floor: 30 Rounds Total Payload Capacity
- Host Rifle Fitment: Standard MIL-SPEC AR-15 / M4 / MCX / Pistol Caliber Carbines in .300 BLK
- Structural Material Base: Translucent Hybrid Polymer Body with Molded Steel Feed Lips
- Feed Lip Construction: One-Piece Hardened Steel Hybrid Wrap-Around Feed Structure
- Floorplate Accent Finish: Impact-Resistant Flat Dark Earth (FDE) Polymer Baseplate
- Internal Spring Component: Heavy-Duty Corrosion-Resistant Stainless Steel Wire Spring
- Exterior Body Finish: Translucent Smoke High-Transmittance Polymer Dressing
- Full Kit Component Checklist: 1x Lancer L5AWM 300BLK 30rd Translucent Smoke Magazine
- Packaging Format Class: Factory Original Sealed Lancer Systems Header Poly Bag
- Product Type Category: Rifle Accessories / Hybrid Polymer Steel Magazines
- Overall Unit Physical Height: ~7.50 Inches (~190.5 mm Standard AR Mag Profile)
- Net Component Mass: ~4.40 Ounces (~124.7 Grams Hybrid Steel/Polymer Mass)
- Global Quality Certifications: Formulated to Rigid US Professional Duty and Military Spec Metrics
- Warranty Tracking Protection: Fully Backed by Lancer Systems Factory Limited Warranty
