SLR Rifleworks Billet Magazine Extension - Fits Glock 20 (10mm Auto) OEM Magazines, +5 Capacity Expansion, 6061-T6 Aluminum, Includes Extended Spring, Matte Black Anodized - GL20-MAG-EXT-20
Product Description
Upgrading a backcountry defense sidearm, heavy-duty duty pistol, or 10mm tactical staging framework requires components built to absolute structural thresholds. Standard polymer magazine floorplates are vulnerable to cracking under the aggressive recoil slam profiles of full-power 10mm Auto loads, while generic extensions often reuse weak factory springs, resulting in high-stress feeding stovepipes on your bench. The **SLR Rifleworks® Glock 20 10mm Magazine Extension (GL20-MAG-EXT-20)** completely flatlines these capacity and ammunition distribution bottlenecks, delivering an ultra-tough **billet aluminum payload extension** engineered from precision tactical blueprints.
Proudly CNC-machined and performance-tested in the United States by SLR Rifleworks, this premium basepad is sculpted from a single solid block of **6061-T6 aircraft-grade aluminum alloy** and finished in a non-reflective matte black hard-coat anodized layer. Designed to slide cleanly onto factory-original Glock 20 magazine bodies, this module adds **five extra rounds of 10mm capacity** to your primary reserve stack. Crucially, the kit features a custom-calibrated, high-memory **extended chrome silicon spring wire** and an internal slide-on polymer retention pocket assembly to ensure smooth, continuous upward cartridge pressure down to the final round. Featuring an absolute mechanical lock provided by an integrated rear retention screw block, this turn-key tactical component upgrades your firearm capacity straight from your workbench.
Engineered to align cleanly with standard weapon frames while adding essential tactical leverage for emergency reloads, this factory-built magazine extension ensures absolute mechanical feeding stability directly from your workspace bench.
*Armorer Bench Notes & Real-World Magazine Staging Guidance: The SLR Rifleworks GL20-MAG-EXT-20 base pad package arrives workspace ready, containing 1x premium billet aluminum magazine extension, 1x custom high-tensile extended spring coil, 1x polymer retention insert sleeve, and an integrated hex retention clamping screw token. PROPRIETARY GLOCK 20 MAGAZINE INTERFACE MATRIX: This precise extension module is engineered natively, strictly, and dimensionally to slide onto **OEM Glock 20 (and Glock 40) 10mm Auto double-stack factory magazine bodies**. *Cross-Platform Mag-well Checklist:* Because of its flared exterior geometry and aggressive front traction ridges, verify that your host firearm configuration uses either a standard open grip or an SLR-branded mag-well shroud on your bench to guarantee zero physical interference during dynamic reloads. Armorer Workbench Custom Staging Sequence: 1. Visually and physically confirm your host magazine and firearm are completely clear of live ammunition, and you are wearing safety eye protection. 2. Depress the standard Glock inner floorplate locking tab tool, then carefully slide the factory polymer basepad horizontally forward off the magazine rails, controlling the compressed internal spring tension. 3. Remove the factory original spring and floorplate insert from the magazine tube shell, while retaining your factory orange polymer follower. 4. Attach your factory follower onto the top loop track of the new SLR extended spring. 5. Thread the spring up inside the mag body, insert the SLR inner plastic alignment guide piece, and compress the coil down flush. 6. Slide the aluminum GL20-MAG-EXT-20 pad horizontally onto the lower retention lips, then utilize a small hex key to snug the rear clamping socket screw down hand-tight to lock the assembly firmly onto your magazine tube rails before testing drop parameters downrange.*
Key Features
- Plus-5 Ammunition Expansion: Expands your native 15-round Glock 20 10mm payload capacity up to a formidable 20 rounds, giving you maximum firepower in bear country or tactical environments.
- CNC-Machined Billet Aluminum: Precision-milled from a block of high-tensile 6061-T6 structural aircraft alloy, eliminating the structural splitting flaws found in factory polymer plates.
- Mil-Spec Hard Anodized Shell: Coated in an ultra-durable matte black hard anodized layer that protects against drop scrapes, sweat corrosion, and aggressive cleaning solvents.
- Custom Extended Spring Included: Package includes an extra-length, high-tensile chrome silicon spring wire to maintain proper vertical column alignment and ensure dependable slide lock-back.
- Aggressive Relief Serrations: Milled with clean, high-friction side relief steps and front texture ridges to provide a high-traction purchase during rapid tactical reloads or clearing malfunctions.
- Secure Rear Clamping Mechanism: Outfitted with an integrated cross-bolt lock screw that pulls the inner retention sleeve tight, keeping the baseplate firmly anchored under severe drop impacts.
Product Specifications
- Brand: SLR Rifleworks® (Winter Garden, Florida)
- Model Line: High-Performance Tactical Enhancements & Billet Magazine Base Pads
- MPN/SKU Code: GL20-MAG-EXT-20 (Glock 20 Plus-5 10mm Anodized Black Specification Base SKU)
- Firearm Magazine Compatibility: Factory Glock OEM 20 / 20SF / 40 Double-Stack 10mm Auto Magazine Tubes Natively
- Ammunition Capacity Conversion: Adds Exactly +5 Rounds for 10mm Auto (10x25mm) Ammunition Columns
- Structural Material Base: CNC-Machined Billet 6061-T6 Aircraft Grade Structural Aluminum Alloy
- Exterior Finish Dressing: Non-Reflective Matte Black Hard-Coat Anodized Surface Finish Coating
- Spring Component Included: Custom High-Tensile Progressive Chrome Silicon Extended Spring Wire
- Retention Architecture: Rear Cross-Bolt Clamping Screw Matrix with Internal Polymer Guide Lug
- Full Kit Component Checklist: 1x Aluminum +5 Extension Pad, 1x Extended Spring, 1x Base Sleeve, 1x Retaining Fastener
- Packaging Format Class: Factory Original Sealed SLR Rifleworks Branded Clear Protective Pack
- Product Type Category: Pistol Accessories / Magazine Extensions & Handgun Baseplates
- Overall Unit Mechanical Width: ~1.28 Inches (~32.5 mm High-Friction Outer Frame Profile Clearances)
- Overall Physical Unit Length: ~1.55 Inches (~39.3 mm Linear Extension Depth Profile)
- Net Component Module Mass: ~2.40 Ounces (~68.0 Grams Lightweight Structural Tactical Alloy Weight)
- Global Quality Certifications: Engineered to Meet Professional Duty and Backcountry Field Specs
- Warranty Tracking Protection: Fully Backed by SLR Rifleworks Factory Performance Performance Guarantee
