Product Overview: Sight: M4
NSN: 1240-00-757-9927
P/N: 7579927

General Description
Sight: M4, is a small instrument provided with a collimator instead of a telescope. They are easily attached or detached from mortars with which they are used in high-angle fire. The cross level, used in conjunction with the cross leveling mechanism, indicated when the mortar is cross leveled. Elevation angles are set on an elevation scale and micrometer. The longitudinal level centers when the mortar elevating mechanism has elevated the mortar to the elevation indicated on the elevation scale and micrometer. Deflections are set on a deflection micrometer. An open sight is used to pick up the target, and the collimator is used for final accurate aiming. The collimator assembly may be depressed or elevated to bring the target into the field of view. The M4 Sight is used with Mortar, Infantry: 60mm, M2 and M19.