Save 18% Compare Hornady 5.56 NATO 55 Grain CX Superformance Rifle Ammunition, Box of 20 5.56 NATO 55 Grain CX Superformance Rifle Ammunition, Box of 20 Increase your rifle's performance up to 200 FPS without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling,... $39.99 $32.99 Add to Wishlist