Magpul PMAG 20 AR/M4 GEN M3 5.56x45mm NATO / .223 Remington 20-Round Polymer Magazine - Compact Profile, Stainless Steel Spring, Four-Way Anti-Tilt Follower, Paint Pen Dot Matrix, Black Finish - MAG560-BLK / 873750007915
Product Description
Setting up a benchrest precision rifle, shooting prone from a bipod, or configuring a maneuverable, low-profile AR-15 carbine requires a magazine that won't contact the ground or obstruct your support position. Standard 30-round magazine bodies extend significantly below the magwell, creating awkward height clearance issues during bench work or prone shooting drills. The **Magpul® PMAG® 20 AR/M4 GEN M3™ (MAG560-BLK / 873750007915)** solves these positioning limitations, packing a **20-round 5.56x45mm NATO / .223 Remington capacity** into a straight-body, ultra-compact profile.
Proudly engineered and manufactured in the United States by Magpul Industries, the GEN M3 technology platform utilizes an advanced **next-generation impact and crush-resistant polymer formula**. Internal feed reliability is driven by a long-life USGI-spec **stainless steel spring** paired with a four-way anti-tilt, self-lubricating follower for smooth, bind-free cartridge presentation. Featuring a flared floorplate for positive extraction, an over-travel insertion stop, and a molded paint-pen dot matrix panel for rapid ID marking, this 20-round magazine delivers ultimate reliability in a compact footprint straight from your armorer bench.
Engineered to seat securely across Colt-spec AR-15 / M4 platforms, HK416, SA-80, FN SCAR MK 16/16S, and non-Mil-Spec STANAG lower receivers, this factory-calibrated polymer magazine ensures absolute feeding synchronization directly from your workspace bench.
*Armorer Bench Notes & Real-World Compact Magazine Staging Guidance: The Magpul MAG560-BLK PMAG 20 GEN M3 package arrives workspace ready as a complete, pre-assembled 20-round polymer magazine unit complete with an impact/dust cover cap. STANAG MULTI-PLATFORM COMPATIBILITY MATRIX: Modified GEN M3 body dimensions allow full locking clearance not only on standard **Mil-Spec AR-15 lower receivers**, but also on European platforms with extended magwell geometry such as the **HK 416 / MR556, British SA-80, and FN SCAR 16S**. *Benchrest & Prone Clearance Checklist:* The straight 20-round housing profile protrudes minimal height past the bottom of the lower receiver, ensuring your rifle sits flush on sandbags, shooting rests, or low bipod setups without binding against the shooting table. Armorer Workbench Custom Staging Sequence: 1. Visually and physically confirm your host rifle is clear of live ammunition, the magazine well is empty, and the chamber is checked safe. 2. Remove the included pop-off impact/dust cover from the top feed lips (this clip-on cap can be stored on the bottom floorplate during operation). 3. Load up to 20 rounds of standard 5.56x45mm NATO or .223 Remington ammunition into the double-stack channel. 4. Use a paint pen marker on the bottom recessed 3x5 dot matrix grid panel to identify cartridge caliber, load type, or magazine inventory index numbers. 5. Insert the loaded PMAG straight into the lower receiver magwell until the magazine catch engages with a distinct tactile click. 6. Press the magazine release button to verify smooth drop-free clearing, then re-seat and manually cycle the bolt carrier group to confirm smooth feed ramp transition before rolling downrange.*
Key Features
- Compact 20-Round Straight Profile: Ideal for prone shooting, benchrest testing, hunting setups, and low-profile tactical gear where 30-round magazine length creates height interference.
- Next-Gen Polymer Construction: Molded from Magpul's proprietary high-impact, crush-resistant polymer formula designed to withstand severe drop impacts and harsh temperature extremes.
- Four-Way Anti-Tilt Follower: Features a self-lubricating, four-way anti-tilt follower that guarantees continuous, bind-free feed tracking under extreme dirt and carbon exposure.
- USGI-Spec Stainless Steel Spring: Outfitted with a long-life corrosion-resistant stainless steel spring that maintains constant upward tension across thousands of loading cycles.
- Paint Pen Dot Matrix Identification: Includes recessed matrix panels at the bottom of the body for easy paint-pen marking to track batch numbers, calibers, or armorer inventory.
- Includes Pop-Off Impact / Dust Cover: Comes equipped with a snap-on polymer top cover to seal out dust/debris and protect feed lips from creep during long-term fully loaded storage.
Product Specifications
- Brand: Magpul Industries® (Austin, TX / Made in the USA)
- Model Line: PMAG® 20 AR/M4 GEN M3™ Series
- MPN/SKU Code: MAG560-BLK (PMAG 20 GEN M3 5.56 NATO Black Standard SKU)
- UPC Code Profile: 873750007915
- Caliber Action Standardization: 5.56x45mm NATO / .223 Remington Centerfire Cartridges
- Magazine Capacity Floor: 20 Rounds Total Payload Capacity
- Host Receiver Fitment: Standard AR-15 / M4, HK416 / MR556, SA-80, FN SCAR MK 16/16S, STANAG 4179
- Structural Material Base: Next-Generation High-Impact Crush-Resistant Proprietary Polymer
- Internal Spring Component: Long-Life USGI-Spec Stainless Steel Wire Spring
- Follower Component: Four-Way Anti-Tilt Self-Lubricating Polymer Follower
- Exterior Finish Dressing: Non-Reflective Textured Matte Black Polymer Armor Shield
- Full Kit Component Checklist: 1x PMAG 20 GEN M3 Magazine, 1x Pop-Off Impact / Dust Cover
- Packaging Format Class: Factory Original Sealed Magpul Poly Bag Header Pack
- Product Type Category: Rifle Accessories / AR-15 Polymer Magazines & Feed Components
- Overall Unit Height Profile: ~5.60 Inches (~142.2 mm Compact Footprint)
- Net Component Weight: ~4.20 Ounces (~119.1 Grams Unloaded Mass with Cover)
- Global Quality Certifications: Built strictly to US Military (NSN) and Commercial Performance Standards
- Warranty Tracking Protection: Fully Backed by Magpul Factory Product Guarantee
