Technical data

TM 9-1005-319-23&P 0037
0037-6
ASSEMBLY - Continued
1 5
6
3
7
8
1 v s 2 2 5
1 4
Figure 5. Installation of Helical Spring.
CAUTION
Ensure that spring pin passes over helical spring, not through its coils.
7. Insert helical spring (7) through underside of gun carrying handle (6). Compress helical spring with a
small tip screwdriver (15) to install spring pin (8). Spring pin must pass over helical spring, not
through its coils. Rotate elevation knob assembly (14) until rear sight assembly (3) is all the way down.
END OF TASK
TEST AND INSPECTION
1. Rotate and test elevating mechanism for ease of functioning.
2. Inspect elevation knob zero as follows:
a. Rotate knob counterclockwise until the rear sight assembly is all the way down. If a whole click is
not felt as the rear sight assembly stops, the rear sight assembly has bottomed out and will not
pivot freely.
b. Position knob back slightly to its last whole click so the rear sight assembly is under tension of ball
bearing and helical spring. The 300 meter mark should align with mark on carrying handle
assembly on the left side.