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ProMag Smith and Wesson SD9 9mm 50 Round Drum Magazine Black DRM A57 UPC 708279015311
Product Description
The ProMag DRM-A57 (SKU: DRM-A57 / UPC: 708279015311) provides maximum sustained firepower and extended operational capacity for Smith & Wesson SD9 and SD9 VE series 9mm handguns. Engineered to hold 50 rounds of 9x19mm Parabellum ammunition, this high-capacity drum magazine dramatically cuts down on reloading frequency during high-volume tactical drills, dynamic range sessions, pistol-caliber carbine conversions, and home defense staging. Purpose-built to lock into factory SD9 grip frames, it maintains a balanced center of gravity that aids in managing muzzle climb and rapid sight tracking under rapid strings of fire.
Constructed to endure severe environmental stress and repeated impact, the drum body is injection-molded from a proprietary DuPont® Zytel™ glass-filled nylon polymer that resists impact shock, chemical bore solvents, oils, and thermal expansion. The upper feed tower is manufactured from stamped, heat-treated carbon steel with a deep blued finish, replicating factory feed lip geometry to resist dimensional spreading under full spring tension and prevent slide binding. Internally, a heavy-duty wound stainless steel spring applies consistent, fatigue-resistant upward force across an injection-molded anti-tilt follower, maintaining positive cartridge presentation from the first shot down to slide lock.
Designed for straightforward staging, the DRM-A57 incorporates an integrated rear ratcheting wheel that allows the shooter to manually relieve spring pressure during the loading sequence, eliminating the thumb fatigue typical of standard high-capacity magazines. The carbon steel feed tower locks positively into the factory SD9 magazine catch without lateral play, providing smooth feeding across standard-pressure FMJ, practice ball, and jacketed hollow-point duty ammunition. Made entirely in the United States, this 50-round drum brings mission-ready high capacity to the dependable S&W SD9 platform.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Fits 9mm Smith & Wesson SD9, SD9 VE, SD9 2.0, and legacy 9mm Sigma (SW9VE/SW9F) platforms. CRITICAL: Exclusively engineered for 9x19mm SD9 and Sigma frames; will NOT seat or feed in S&W M&P 9mm, Shield, Shield Plus, CSX, or any .40 S&W models (SD40/SD40 VE). Never spray aerosol penetrants, wet lubricants, or gun grease inside the polymer drum body, as wet agents attract carbon fouling and binder residue that cause follower binding; clean dry with compressed air or use a dry PTFE micro-film lubricant if required.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty. Lock the slide to the rear before inserting the drum magazine.
- Load 9mm cartridges incrementally into the feed tower; use the rear-mounted finger-assist ratcheting wheel to relieve downward spring pressure as each round is seated into the feed track.
- Inspect the top cartridge to verify that it sits level and fully seated beneath the blued steel feed lips prior to inserting the magazine into the weapon.
- With the slide locked back, insert the steel magazine tower firmly into the pistol grip well until the magazine catch clicks positively and audibly into the engagement slot.
- Depress the slide stop or pull the slide fully to the rear and release sharply to chamber the first cartridge; verify full battery lockup and extractor engagement before commencing live-fire operations.
Key Features
- Extended 50-Round Drum Capacity: Delivers continuous high-volume firepower for dynamic tactical training, PCC platforms, and range drills without frequent magazine changes.
- DuPont® Zytel™ Polymer Construction: Heavy-duty glass-reinforced polymer body resists severe drop impacts, field solvents, UV degradation, and thermal distortion.
- Heat-Treated Blued Carbon Steel Tower: Full-length steel feed tower preserves critical feed lip geometry and withstands continuous spring tension without spread.
- Corrosion-Resistant Stainless Steel Spring: Precision-wound, heat-treated stainless steel wire spring provides continuous, uniform feeding pressure from round 1 to round 50.
- Injection-Molded Anti-Tilt Follower: Smoothly channels 9mm cartridges from the radial drum track into the vertical feed column without nose-diving.
- Rear Tension-Relief Loading Wheel: Relieves spring resistance manually during loading to streamline high-round-count reloading sessions.
- Positive Factory Lockup: Precision-stamped magazine catch window ensures rigid, reliable retention in factory Smith & Wesson SD9 grip modules.
- Made in the USA: Manufactured in the United States by ProMag Industries under stringent quality control standards.
Product Specifications
- Brand: ProMag Industries®
- Model/Series: Smith & Wesson® SD9™ 50-Round Drum Magazine
- MPN / SKU: DRM-A57 / DRMA57
- UPC: 708279015311
- Caliber: 9mm Luger (9x19mm Parabellum)
- Capacity: 50 Rounds
- Body Material: DuPont® Zytel™ Glass-Filled Polymer
- Tower Material: Heat-Treated Carbon Steel (Blued Finish)
- Follower: Injection-Molded Anti-Tilt Polymer
- Spring: Heat-Treated Stainless Steel Wire
- Color/Finish: Matte Black
- Platform Compatibility: Smith & Wesson SD9, SD9 VE, SD9 2.0, and SW9 / Sigma 9mm Series
- Country of Origin: United States
