Italy markings on M93R 2nd edition
USA markings on M93R 1st edition
Selective switch for single shot and 3 shot burst, no full autos
1 st ed (L) and 2nd ed (R), very useful ports to suppress muzzle rise
One small difference between 1st and 2nd ed, firing pin is smaller on the 1st edition
The realism of model gun can always be presented by it chamber