MOUNT, TELESCOPE:M21A1
Model:M21A1
Federal stock No.:
M21A1---------1240-757-8596
General:
MOUNT, TELESCOPE:M21A1, is used with TELESCOPE, PANORAMIC:M12A7H for laying in azimuth for direct and indirect fire on HOWITZER, LIGHT, TOWED:105-mm, M101A1. This mount consists of a socket which supports the panoramic-telescope, a longitudinal leveling mechanism, a cross leveling mechanism and azimuth error caused when the weapon is elevated with the trunnions out of level. There is an index on the longitudinal leveling mechanism and a matching pointer on a clamp. The mounting bracket has an extension with a hole for mounting the telescope mount on the trunnion of the weapon. Instead of scales and micrometers, there are indexes on the rocker and actuating arm to indicate 0° elevation. There is no angle of site mechanism. LIGHT, INSTRUMENT:M19 is used with the mount for night operation.
differences among models
data plate location
The identification plate (nameplate) is on the cross level worm mechanism.
Classification:Standard A(OTCM 25702)
CHARACTERISTICS
Length............................. 113/4 in.
Width............................... 113/8 in.
Height.............................. 101/8 in.
Weight............................. .46 lb
Limits of Operation:
Elevation..................... 1,955.80 mils of arc
Depression................. 533.40 mils of arc
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