Airsoft Chay check's out the KWA Lithgow Arms F90 GBB Bullpup rifle that has been out in the market for sometime now. The KWA F90 GBB is a refined version of the AUG, featuring a shorter length of pull, extended picatinny rails, a folding charging handle, a two-stage trigger with ALO, and various ergonomic improvements borrowed from Australian Army rifles. Internally, it shares components with other KWA GBB products while incorporating a refined hop-up design and bolt carrier.