SIGHT:M4

Model：M4

Federal stock No.：
M4---------1290-757-9927

General：
SIGHT, M4, is a small compact instrument provided with a collomator instead of a telescope. They are easily attached to or detached from mortars with which they are used in high-angle fire. The cross level, used in conjunction with the cross leveling mechanism, indicates when the mortar is cross leveled. Eievation 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：60-mm, M2 and M19.

differences among models

data plate location
The identification is located directly above the cross level.

Classification： M4-Limited Standard（OTCM 37119）

CHARACTERISTICS
Length............................. 47/8 in.
Width............................... 3/8 in.
Height.............................. 27/8 in.
Weight............................. 1.16 lb
Limits of Operation：
Elevation..................... 40 to 90°