Body Armor, Interceptor (IBA), Outer Tactical Vest (OTV), NSN 7-8598, Woodland Camo, X-Large Ballistic Plates Summary - SafeGuard ARMOR The SAPI plates were contained in the Outer Tactical Vest (OTV) of the IBA, and were capable of stopping the 7.62mm rifle projectileat an approximate muzzle velocity of 2,750 feet per second.