Shield Arms S15 Gen 3 Extended 20 Round Magazine for the Glock 43X 48 With Black +5 Baseplate S15 ME 5INS G3 BLK UPC 853465008995
Product Description
The Shield Arms S15 Gen 3 Extended 20-Round Magazine (S15-ME-5INS-G3-BLK) is a factory-assembled, ultra-high-capacity magazine engineered specifically for the Glock 43X and Glock 48 single-stack 9mm handguns. Combining Shield Arms' flush-fit S15 Gen 3 steel magazine body with their precision-machined +5 aluminum magazine extension, this unit doubles the standard 10-round factory capacity of slender slimline Glocks into a formidable 20-round payload.
The Gen 3 magazine body features raised indexing ribs, re-engineered feed lip geometry, and a durable black finish to maximize durability, magazine catch lockup, and smooth drop-free performance. Attached at the base is a hardcoat anodized black billet aluminum +5 extension powered by an extra-long, high-tensile steel spring that provides continuous upward follower pressure to prevent nose-diving and ensure positive bolt/slide lock-back on empty.
Arriving fully assembled straight from Shield Arms, the S15 Gen 3 20-round extended magazine is an ideal solution for home defense staging, tactical carbine/PCC conversion setups, and high-volume range training with slimline Glock platforms.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits Glock 43X, Glock 43X MOS, Glock 48, and Glock 48 MOS (9mm). MANDATORY REQUIREMENT: Must be used with an aftermarket metal magazine catch (such as the Shield Arms Steel Mag Catch). Standard OEM Glock plastic magazine catches will wear out rapidly over time due to steel-on-plastic friction.
- Perform a complete firearm safety check: drop the magazine, lock the slide rearward, and visually inspect the chamber to verify zero live rounds are present.
- Verify that a steel magazine catch is installed in your Glock 43X/48 grip frame prior to inserting steel S15 magazines.
- Inspect the feed lip geometry, follower, and baseplate locking pin on the S15 Gen 3 assembly.
- Load up to 20 rounds of 9mm NATO ammunition into the magazine, using a quality speed loader to manage spring tension on the final rounds.
- Insert the extended magazine firmly into the grip well until the steel magazine release engages with a distinct click.
- Depress the magazine release button to verify smooth, drop-free ejection during tactical reload drills.
Key Features
- 20-Round Extended Capacity: Combines a 15-round S15 Gen 3 steel magazine body with a pre-installed +5 billet aluminum extension.
- Gen 3 Steel Body Engineering: Feature-enhanced feed lip geometry, raised side indexing ribs, and improved rear sight lines for smooth feeding and retention.
- Steel Magazine Construction: Replaces factory thick-walled plastic design with high-tensile steel to dramatically increase round capacity in slimline frames.
- Pre-Installed +5 Aluminum Baseplate: Machined from 6061-T6 aluminum with a durable black hardcoat anodized finish for impact resistance during tactical mag drops.
- Extra-Long High-Tensile Spring: Includes a heavy-duty power spring calibrated to deliver reliable feeding through all 20 rounds and engage slide lock on empty.
- Made in the USA: Proudly engineered, machined, and assembled in the United States backed by Shield Arms 100% warranty.
Product Specifications
- Brand: Shield Arms
- Model/Series: S15 Gen 3 Extended Magazine with +5 Extension
- MPN / SKU: S15-ME-5INS-G3-BLK
- UPC: 853465008995
- Caliber: 9mm NATO / 9x19mm Luger
- Capacity: 20 Rounds
- Platform Compatibility: Glock 43X / Glock 43X MOS / Glock 48 / Glock 48 MOS
- Body Material: Stamped High-Tensile Steel
- Baseplate Material: 6061-T6 Billet Aluminum (+5 Extension)
- Finish / Color: Matte Black / Anodized Black
- Weight: 5.8 oz
- Country of Origin: USA
