Rock Island Armory® by Metalform® Full-Size 1911 A1 Factory OEM Replacement Magazine – .40 S&W – 8-Round Capacity – Carbon Steel Body with Blued Finish & Removable Bumper Pad – 40SW.293B.LFL
Product Description
The Rock Island Armory® by Metalform® Full-Size 1911 A1 Factory OEM 8-Round .40 S&W Magazine (40SW.293B.LFL) represents a premier, duty-vetted mechanical baseline in single-stack handgun feeding logistics, masterfully engineered to maintain flawless cyclic synchronization inside full-size Government-profile 1911 pistols. Purpose-built to match the exact internal grip geometry and mechanical timing dynamics of Armscor and Rock Island Armory's hard-hitting .40 Smith & Wesson "Rock" and GI series handguns, this 8-round premium repository ensures an uncompromised ammunition pipeline. While universal third-party generic 1911 magazines are notorious for feed-lip shifting under spring load, uneven release timing curves, and intermittent slide-stop failure bugs, this genuine factory collaboration completely eliminates those catastrophic liabilities. This robust single-stack cell (812285021256) provides an indispensable primary asset for tactical backup staging arrays, high-volume match competition loops, and daily personal defense security infrastructure.
The structural foundation of this high-efficiency single-stack repository is precision-drawn from a single piece of premium overbuilt high-carbon alloy structural steel tubing. Manufactured to the absolute highest tier of specialized tolerances by Metalform—the premier American OEM supplier to elite firearms brands—the steel housing handles intensive drop stress onto hard outdoor range surfaces during high-tempo tactical reloads without experiencing side-wall warping. The entire metal shell is treated with a traditional, deep-penetrating Classic Polished Blued Finish. This specialized conversion treatment creates a slick, anti-friction outer skin that lowers mechanical dragging resistances inside your pistol's magazine well, facilitating rapid, smooth gravity drops when pressing the mag release while providing a tough protective barrier against acidic skin oils, sweat, and environmental moisture.
The true operational triumph of this factory original masterpiece lies in its internal stabilization matrix and customizable basepad ergonomics. Moving away from standard plastic followers that can naturally shave down, crack, or take a physical set over long staging loops, this configuration implements a precision-formed flat steel follower driven by a heavy-duty, heat-treated high-tensile steel wire coil spring motor. This heavy spring generates perfectly linear upward force against the .40-caliber stack, controlling cartridge presentation angles to eliminate nose-diving malfunctions on the feed ramp. The lower assembly is capped by an impact-resistant, removable rubber bumper pad that cushions the magazine base from structural impact shock during aggressive speed reloads, while extending slightly below the frame for positive indexing; the pad can also be removed by armorers to obtain a traditional, ultra-concealable flush-fit profile inside standard carry holsters.
Includes: (1) Rock Island Armory by Metalform Full-Size 1911 A1 8-Round .40 S&W Steel Magazine (Blued Steel Finish, Stamped Metal Anti-Tilt Follower, High-Tensile Wire Spring, Pre-Installed Removable Rubber Bumper Pad Base), and Factory-Branded Sealed Internal Staging Wrap.
*Safety/Installation & Frame Selection Guidance: The Rock Island Armory 40SW.293B.LFL magazine is calibrated exclusively for .40 S&W ammunition; do not attempt to load .45 ACP, 10mm Auto, or 9mm Parabellum cartridges into this single-stack casing. This magazine is engineered specifically for standard Full-Size Government/Commander single-stack (A-1) 1911 frames and will NOT fit or seat inside double-stack (A-2) wide-body magwells or compact Officer-sized frames. Always verify your firearm is completely unloaded, physically cleared, and verified safe with the muzzle pointed downrange before conducting maintenance or loading sequences.
Key Features
- Genuine Metalform OEM Production: Manufactured to strict Armscor/Rock Island factory specifications by Metalform to guarantee flawless frame seat alignment and factory warranty retention.
- Heavy-Walled Carbon Steel Core: Stamped from high-yield carbon steel alloy sheet to prevent the feed lips from expanding or bending out of alignment under continuous spring tension.
- Classic Polished Blued Finish: Traditional mirror-blued surface coating lowers tracking friction inside aged magwells, guaranteeing seamless tactical drop-free action.
- High-Tensile Wire Compression Spring: Performance-tuned internal motor preserves crisp elastic memory over extended staging cycles under full loading compression.
- Heavy-Duty Stamped Steel Follower: Premium anti-tilt metal tracking plate prevents cartridge nose-diving, smoothing out feed vectors for hollow-point defensive rounds.
- Removable Rubber Bumper Pad: Pre-installed rubber extension facilitates positive tactical indexing and drop cushion protection; removable to achieve classic flush metal aesthetics.
Product Specifications
- Brand: Rock Island Armory® / Armscor International (Manufactured natively by Metalform, USA)
- Product Line: Factory Original Equipment Manufacturer (OEM) Performance Accessory Matrix
- Model Series Designation: Rock Island Armory 1911 A1 Full Size .40 S&W 8-Round Blued Magazine
- SKU / MPN: 40SW.293B.LFL (Alternative Factory Identifiers: 40SW293BLFL / 40SW.293B.LF)
- Firearm Platform Interface: Full-Size Government & Commander 1911 Single-Stack (A-1 Profile) Rifles & Pistols
- Platform Fitment Exclusions: Does NOT fit Double-Stack 1911 A-2 Magwells, Compact Officer Models, or 2011 Handguns
- Caliber Class Chambering: .40 Smith & Wesson (.40 S&W / 40SW)
- Maximum Magazine Capacity: 8 Rounds (Single-Stack Linear Ammunition Column)
- Tube Construction Core: Precision-Drawn Heat-Treated High-Carbon Structural Steel Alloy
- Surface Coating Treatment: Non-Reflective High-Polished Corrosion-Resistant Blued Steel
- Follower Component Profile: Heavy-Duty Stamped Alloy Steel Anti-Tilt Follower Core
- Internal Spring Architecture: Heat-Treated High-Tensile Carbon Steel Wire Wound Compression Coil
- Baseplate Profile: Removable Textured Black Rubber Bumper Cushion Over Steel Floorplate
- Visual Configuration Layout: Vertical Ammunition Status Sight Witness Windows on Lateral Wall
- Product Net Component Weight: ~0.25 lbs (~4.00 oz) - Durable Structural Handgun Asset
- Total Packaging Shipping Mass: ~0.55 lbs (Enclosed Inside Protective Padded Retail Distribution Shielding)
- UPC Barcode: 812285021256
