Original U.S. WWII Era M4 Collimator Sight With M14 Leather Carry Case - As Used on 60mm and 81mm Mortar Systems French Machine Guns Unfortunately there are no markings

Unfortunately there are no markings on either the helmet or the liner

St-55-A belt for use with the U

Shortly after the start of Germany's invasion of the Soviet Union in June 1941

It has been de-activated to BATF specifications and built on a re-welded original receiver with 2 inches completely replaced

It also has had an additional brass bushing mounted on the barrel for a second tripod attachment point

Original U.S. WWII Era M4 Collimator Sight With M14 Leather Carry Case - As Used on 60mm and 81mm Mortar Systems French Machine Guns Unfortunately there are no markingsOriginal Item: Only One Available. This is a fantastic example of an M4 Collimator sight with an equally nice leather M14 carry case. This sight was used on both the US 60mm and 81mm mortar systems. By laying the sight on aiming stakes, the mortar squad could fire indirect missions. The open sight allowed the squad to fire direct lay missions. A collimator sight is a type of optical sight that allows the user looking into it to see an illuminated