美国俄勒冈州的57中心公司虽然成立时间不长,并且到目前为止只出产了一支成品武器——AR57冲锋枪,但却给武器市场带来了不小的震动。该枪原封不动地借用AR系步枪的下机匣和FN公司P90/PS90单兵自卫武器独特的50发弹匣及5.7×28mm手枪弹,这几大元素的组合本身就令人为之欣喜。该枪目前虽然主攻民用市场,但其真正瞄准的目标却是更广阔的警用市场—— The 57-center company in Oregon, USA, although not established long ago, has produced only one finished weapon so far - the AR57 submachine gun, but it has brought considerable shock to the weapons market. The gun intact AR AR Rifle under the receiver and the FN P90 / PS90 individual self-defense weapons unique 50-round magazine and 5.7 × 28mm pistol shells, the combination of these few elements itself is very pleased. Although the current main focus of the gun civilian market, but its real aim is to target a broader police market -