The M8 had the 37mm gun, also found on the M3 and M5 light tank of the period, and the M20 version dispensed with the turret in an attempt to lighten the vehicles to prevent their getting stuck so frequently. They were found to be a fine vehicle for armoured cav, the recon sections of tank destroyer units, and Military Police units.
The open-topped M20 version fitted a .50 Caliber M2 Browning machinegun, the same gun that's to equip the Stryker, though the Stryker's Remote Gun System was unable to fire more than 45 rounds continuously during initial gun testing; the ring mount *free gun* used on the M20 had a 105-round ammo box, and a 225-round *tombstone* ammo can could be fitted.
Some M20s were also fitted with other weapons packages, including the 81 and 4.2" mortars, the quad .50 AA machinegun, and 20mm cannons. The French have also developed a turret mount to fit the turret of the Panhard AML90 armored car with 90mmgun on an M8 or M20 chassis.
M8 Greyhound:
M20 Armored Recon Car:
