ProMag FN PS90 5 7x28mm 50 Round Magazine Black FNH A3 UPC 708279011139
Product Description
The ProMag FN PS90 5.7x28mm 50-Round Magazine in Black (MPN: FNH-A3) is a high-capacity, aftermarket replacement magazine engineered for FN PS90 carbines and P90 personal defense weapons (PDWs). Delivering a full 50-round loadout of 5.7x28mm ammunition, this magazine expands target engagement capability and provides a reliable, cost-effective alternative for range training, tactical drills, and high-volume shooting sessions.
Precision-molded from high-impact, proprietary polycarbonate polymer, the FNH-A3 feature translucent smoked housing properties with black baseplate accents that allow operators to instantly visually verify remaining round counts. The magazine incorporates a heavy-duty internal feed mechanism, featuring a precision-molded feed rollers and a heat-treated, high-tensile chrome-silicon wire spring. This ensures smooth, continuous feeding through the PS90's unique top-mounted horizontal feeding system, which rotates cartridges 90 degrees prior to chambering.
Engineered to exact dimensional tolerances, the ProMag FNH-A3 locks securely into the top receiver well of FN PS90 and P90 firearms with zero slop. Designed for durability and long-term spring life, it represents an essential backup spare for owners seeking reliable high-capacity feeding for their 5.7x28mm bullpup rifles.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits FN PS90 carbines and FN P90 PDWs chambered in 5.7x28mm exclusively. (Note: Will NOT fit FN Five-seveN pistols, Ruger-57, or AR-57 upper receivers that require specialized mag well geometry without verifying latch clearance).
- Perform a complete firearm safety check: retract the charging handle, visually/physically inspect the chamber through the bottom ejection port, and verify zero live rounds are present.
- Load 5.7x28mm cartridges into the top feed rollers perpendicular to the magazine body, pushing down and sliding rounds rearward to stack horizontally.
- Align the front notch of the loaded ProMag FNH-A3 magazine with the front catch post on top of the PS90 receiver.
- Press the rear of the magazine firmly downward into the top receiver latch well until the ambidextrous release tabs click into locked position.
- Perform a quick upward tug test on the magazine housing to confirm complete latch engagement before chambering a round.
- Charge the weapon by pulling the charging handle fully rearward and releasing it to allow the feed rollers to smoothly rotate and chamber the initial cartridge.
Key Features
- Full 50-Round Standard Capacity: Provides maximum firepower for FN PS90 and P90 platforms without extending past factory contours.
- Impact-Resistant Polycarbonate Body: Molded from heavy-duty polymer to withstand hard range drops and thermal stress.
- Translucent Smoked Housing: Clear/smoked body allows instant visual verification of remaining 5.7x28mm round capacity.
- Heat-Treated Chrome-Silicon Spring: Heavy-duty spring maintains consistent upward follower tension for reliable horizontal feeding.
- Precision 90-Degree Feed Rollers: Smooth internal roller geometry guides cartridges through the PS90's rotational feed ramp.
- Made in the USA: Manufactured by ProMag in the United States and backed by a lifetime factory warranty.
Product Specifications
- Brand: ProMag
- Model/Series: FN PS90 / P90 Replacement Magazine
- MPN / SKU: FNH-A3
- UPC: 708279011139
- Platform Compatibility: FN Herstal PS90 / P90
- Caliber Compatibility: 5.7x28mm
- Capacity: 50 Rounds
- Body Material: Polycarbonate Polymer
- Finish / Color: Translucent Smoked / Black Accents
- Spring Material: Heat-Treated Chrome-Silicon Wire
- Weight: 7.2 oz
- Country of Origin: USA
