No — stops inside steel ar500 (reaches 8 mm of a 10 mm barrier)
Penetration depth
8 mm (0.3″)
Impact velocity
920 m/s (3018 fps)
Muzzle energy
1693 J (1249 ft-lb)
Bullet behaviour
Intact
Fired at the muzzle, a representative 5.56 NATO load (4 g, FMJ, 920 m/s) reaches roughly 8 mm (0.3 inches) into steel ar500. It loses its energy before defeating a typical barrier of this material.
About Steel AR500
Hardened AR500 steel (~10 mm) is used for rifle-rated targets and armor.