The Fabrique Nationale (FN Herstal) FN M3P is a vehicle machine gun based on the hugely successful Browning M2 .50 caliber heavy machine gun series. The M3P is simply a modernized form intended for use on trainable vehicle mountings or as a fixed vehicle/aircraft gun (podded or open-air). It can be manually-fired or remotely fired (via solenoid) which sufficiently broadens battlefield applications. In the former, it can be sat upon a trainable pintle mounting and used as a normal open-air, air-cooled machine gun (defensive application or on a vehicle/watercraft for offensive purposes). In the latter, it can serve through a remote weapons station installation, as a coaxial machine gun on a tank (or other wheeled/tracked armored vehicle) or in "podded" form and slung under the wing of an aircraft - light strike or helicopter - used in conjunction with the aircraft's existing weapons software suite.
The FN M3P showcases a design faithful to the original Browning with its rectangular receiver, large ejection port and feed units and perforated barrel for air cooling. A large, cylindrical muzzle brake is fitted. Belt-feeding is standard (from left or right of the receiver) as is full-automatic fire. The weapon is chambered for the proven 12.7x99mm NATO standard heavy cartridge and fires at a rate nearing 1,025 rounds per minute. its overall construction provides a weight-savings measure over the original Browning M2.
The FN M3P is marketed across several designated variants beyond the base open-air gun mounting. These include the podded FN HMP250 (250-rounds), the FN HMP400 (400-rounds) and FN RMP (250-rounds with 3 x 2.75" rockets underslung).