This is a ProMag® 50-round magazine for FN® P90/PS90 firearms.
Built from clear polycarbonate with ProMag’s special anti-fatigue chrome silicon springs, these magazines are designed to be loaded and stored at capacity without sacrificing performance. One of history’s most iconic bullpup firearms, the FN P90 (and its civilian-legal cousin the PS90) represent a unique innovation in firepower that’s still sleek and cutting-edge decades later—packing FN’s proprietary, high power 5.7mm into a tiny package. As with all ProMag magazines, these come with a lifetime guarantee, ensuring you’ll receive a free replacement if you ever have an issue with your purchase.