AR57: Fun Times with a Tiny Carbine (aka FSS Hurricane)
The AR57, also known as the FSS Hurricane, adapts the FN P90's 5.7x28mm system to an AR-15 lower receiver, utilizing the magazine well for ejection. It offers low recoil and high capacity but suffers from expensive ammunition and a critical out-of-battery safety flaw. The design allows for standard AR-15 triggers and modularity, with second-generation models featuring weight reduction.









