(b) Two Ar500 Steel Gong 12" X 20" X 3/8" Silhouette Shooting Targets- Rifle Target These AR500 steel targets work great for most pistol and rifle calibers, including 9mm, 45ACP, .223, 30-06 & 308 as well as most other high powered rifle calibers. Steel shooting targets are CNC Laser Cut from new high quality 3/8 inch thick AR500 steel plate made in the USA. Moves and sounds off when hit Audible ring confirms hit Free Shipping!!!!!!!!!!