Mec-Gar USA® Beretta® PX4 Storm Extended Magazine – 21 Rounds – Anti-Friction Coating – Black – MGPBPX421AFC
The Mec-Gar USA® Beretta® PX4 Storm 21-Round Extended Magazine in Black (MGPBPX421AFC) is a premium, professional-grade handgun feeding module masterfully engineered to increase ammunition capacity, maximize structural lifecycle performance, and ensure match-grade tracking fluidity. While standard flush-fit pistol magazines restrict your onboard load count—demanding frequent, time-consuming reload loops during intense training strings or home-defense encounters—and cheap aftermarket shells often suffer from brittle baseplates and erratic feed lip tolerances, Mec-Gar sets the global standard. This high-capacity operational upgrade (765595512108) expands your firepower baseline while delivering legendary, field-proven factory reliability.
The structural foundation of this extended magazine is precision-formed from heavy-gauge, heat-treated carbon steel to resist body warping, crushing, and aggressive feed lip spread under continuous spring pressure. The defining technical edge of the MGPBPX421AFC framework is its proprietary Anti-Friction Coating (AFC) finish. This advanced chemical treatment deeply penetrates the steel shell, providing an ultra-slick, low-drag barrier that slashes surface friction. The result is exceptionally smooth cartridge stack indexing during high-volume loading, effortless magazine dropping from the frame, and a highly resilient, rust-proof shield that shrugs off corrosive sweat and field moisture.
The true functional highlight of this specific model is its extended 21-round capacity configuration, achieved by seamlessly integrating a high-impact, ergonomically contoured polymer floorplate over the steel housing. This extended baseplate adds comfortable grip surface area for positive manual stripping while shielding the magazine assembly from structural damage during aggressive drop-to-concrete training loops. Inside, a high-visibility, anti-tilt polymer follower is driven by a heavy-duty, premium high-tensile music wire spring to maintain uniform vertical orientation, eliminating nose-dives and feeding errors up to the very last shot. Proudly manufactured in Italy by the world’s foremost OEM magazine contractor, this drop-in powerhouse maximizes shooting efficiency for home defense, tactical range work, and competitive arena arrays alike.
Includes: (1) Mec-Gar USA Beretta PX4 Storm 9mm 21-Round Extended Magazine with Anti-Friction Coating (Black) and Integrated Polymer Extended Baseplate.
*Magwell & Accessory Compatibility Note: Due to the flared geometry of the extended polymer floorplate, this high-capacity magazine is explicitly not compatible with aftermarket funneled magazine guides or competition magwells. It is designed to seat completely flush and securely lock inside factory-standard, unmodified Beretta PX4 Storm full-size and compact grip frames.
Key Features
- Extended 21-Round Capacity: Maximizes your tactical onboard volume, giving you 21 rounds of 9mm firepower to drastically extend target strings before a forced reload sequence.
- Proprietary Anti-Friction Coating: Specialized low-drag treatment ensures lightning-fast cartridge indexing, completely smooth mag drops, and exceptional rust mitigation.
- Heat-Treated Carbon Steel Tube: Rigorous heat tempering provides immense structural rigidity, keeping feed lips dimensionally stable under severe operational drop shock.
- High-Tensile Music Wire Spring: Heavy-duty internal spring engineering maintains linear upwards pressure, eradicating stove-pipes and feeding failures down to the final casing.
- Ergonomic Extended Floorplate: Tough composite base block adds crucial handling leverage for lightning-fast reloads while acting as a robust armor cap against hard decks.
- Made in Italy by Mec-Gar: Engineered by the gold-standard factory behind the world's most trusted military, law enforcement, and OEM pistol feeding systems since 1965.
Product Specifications
- Brand: Mec-Gar USA® / Mec-Gar S.R.L. (Gussago, Italy)
- Product Line: Extended High-Capacity Handgun Series
- Model Name: Beretta PX4 9mm 21-Round Extended AFC
- SKU / MPN: MGPBPX421AFC (Alternative Part Format: MCGPBPX421AFC)
- Firearm Handgun Fitment: Beretta® PX4 Storm Series (Full-Size & Compact Models)
- Calridge Accommodation Class: 9x19mm NATO / 9mm Luger Centerfire Handgun
- Magazine Capacity Limit: 21 Rounds
- Chassis Housing Material: Heat-Treated Carbon Steel
- Surface Treatment Finish: Proprietary Slick Anti-Friction Coating (Black)
- Internal Spring Matrix: High-Tensile Music Wire
- Follower Profile: High-Impact Anti-Tilt Polymer
- Baseplate Cushion Class: Extended Polymer Impact-Resistant Floorplate
- Tracking Status Indicator: Rear-Facing Indexed Witness Holes
- Country of Origin: Proudly Made in Italy
- Product Net Component Weight: ~4.00 oz (113.4 g)
- UPC: 765595512108
