Hellenic National Guard M40A1 recoilless rifle firing sub-munition and .50 cal spotting rounds in a target area. Watch the recoil of 0.50 cal M8C spotter gun and the smoke of sub-munition round. Recorded with a Casio Ex F1 digital camera at 600 frames per second.
Despite its designation as a 106mm weapon, its correct calibre is 105mm. The mis-calibration was to avoid confusion with an earlier 105mm weapon.
The 106mm RCL was designed as a light weight anti-tank weapon that could kill main battle tanks. The .50 calibre (12.7mm) spotting rifle M-8C was designed to be the primary ranging device for the weapon. The .50 calibre spotter round is much shorter than the .50 calibre Browning machine-gun cartridge. The spotter round is a ballistic match to the HEAT and HEP rounds fired by the M-40A1. On impart with the armored target, the gunner saw a puff of white smoke in his sight. If the puff of smoke is on target, he fired the main gun. If not, he made his traverse and elevation corrections and fired the .50 spotter again. The back blast from the breech extended in a cone-shaped fan 75 yards deep and 150 yards wide.
Music: Shadows and Nightmares, 20000 Tons of TNT
