Completely new AR-57 rifle build. Upper accepts FN 50 round 5.7x28mm PS90 mags (2 included with rifle). Upper features also include multiple tactical rails and flash surpressor. Rifle includes a C3 Defense billet lower, Ergo Grip, DPMS lower parts kit, Magpul winter trigger guard, CAA six position tactical stock and buffer tube assembly (including the correct AR-57 buffer). Every component of this rifle is brand new including the FN mags. Current retail on a new FN PS90 50 rnd mag is up to $59.99 on Impact Guns and other gun related websites. Open to trade for a HK or FN pistol.