Fired the 57mm in basic in 1957 and the concussion made one of my ears bleed. The concussion force from the blast felt like you clapped both hands over your ears fast and hard. While in Germanyand assigned to the heavy weapons platoon, the two 57's were carried by two of the smallest guys in the platoon, both about 5'5". 130 lbs. both cousins. Guys with rifles had a hard time keeping up with them on a march, Ray