22lr & 9mm AR400 Steel Targets 3" X 3/16" 3/16 AR400 is excellent for 22lr but suitable for rounds up to 9mm. Specially made for 22lr and 9mm ammunition it's loud when hit and moves easily. 3/16" thick genuine certified CNC LASER CUT AR400 steel. Will last forever with 9mm ammo and smaller. See Special Offers and Product Promotions below for big savings. See description below for more product information.