AMMUNITION, .50 cal Cartridge, Caliber .50, Ball, Spotter-Tracer, M48A1/ M48A2 Caliber: 12.7 x 77 mm Weapon Used In: M8C Spotting Rifle Weight Complete: 0.17 kg Length Complete: 11.51 cm Packaging: 10 rounds per cardboard box Packaging Weight: 1.70 kg NOTE: The projectile contains a tracer element and an incendiary filler. On impact, the incendiary filler produces a puff of white smoke which aids in adjusting fire. The tracer element burns out at 1500 m. The spotter-tracer round is designed so that its trajectory closely matches the trajectory of the M40A2 recoilless rifle service munitions.