The KWA F90 GBB is available at Fox Airsoft and they share what they think about this replica based on the Lithgow Arms design. This airsoft rifle combines a space-saving bullpup design with realistic construction and field stripping for easy maintenance. It offers both semi-automatic and fully-automatic firing modes for versatility, along with gas-operated recoil blowback for a realistic shooting experience. Functional bolt catch, bolt release, and ambidextrous magazine release allow for smooth operation for both right and left-handed users. For customization, it features a Type 3 adjustable hop-up for fine-tuning projectile trajectory, and three Picatinny rails for mounting various accessories.