As the first to answer NATO's call for a replacement of 9x19mm Parabellum firearms, the P90 was developed alongside FN Herstal's 5.7x28mm cartridge. This platform was designed to be both ergonomically compact and a powerful small arm, benefiting from extensive research aimed at creating an optimised ergonomic design, which resulted in its distinctive appearance. Known as a Personal Defense Weapon (PDW), the P90 was tailored for specialised roles, including special forces, counter-terrorism, support personnel, and vehicle crew operators. Its futuristic design enables easy manipulation in tight spaces while ensuring ergonomic comfort for extended use, and its compact profile facilitates concealed carrying. An early adopter of ambidextrous controls, the PDW features a charging handle, magazine release, and iron sights that are symmetrically arranged, accommodating both right- and left-handed shooters. The fire selector is conveniently located at the base of the trigger, with spent shell casings ejected downwards, promoting seamless accessibility.
In its AEG iteration, King Arms faithfully replicates the P90, complete with fully licensed trademarks and rollmarks from FN Herstal, under the licensing of EMG x Cybergun. Constructed from reinforced polymer for the chassis and an alloy receiver, this SMG mirrors the futuristic design of its real steel counterpart, featuring familiar fire controls for users of the P90 platform. As the tactical version of the P90, it incorporates a tri-rail Picatinny rail interface instead of the iconic red dot system, allowing owners to attach their preferred optics and accessories to enhance the PDW's performance.
The King Arms P90 includes an adjustable hop-up wheel located beneath the main chassis, just above the rear trigger guard, enabling users to modify the hop to suit the BB weight. It also features a removable flash hider that reveals a 14mm CCW outer barrel threading for mounting muzzle devices or tracer units, alongside a translucent P90-style 100-round AEG magazine, allowing users to monitor the round capacity in real time. At its core is a reinforced V6 gearbox, ensuring reliable performance with compatibility for Tokyo Marui components. Access to the battery compartment and the quick-change spring mechanism is conveniently located at the rear of the gun, easily accessible by pressing the buttstock, which reveals the Tamiya battery plug for a 7.4v or 11.1v Li-Po battery. The quick-change spring mechanism offers a practical solution for swapping springs to meet field power requirements. Notably, the P90's bullpup design accommodates a 290mm inner barrel, providing range and accuracy comparable to that of a standard M4 rifle.
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