Specifications

TM 05539-IN
SAFETY AND TRIGGER MECHANISM - CONTINUED 0024 00
0024 00-10
ASSEMBLY - CONTINUED
10. Check the operation of the bolt stop and bolt stop release by pressing on the bottom of the bolt stop release. The bolt
stop release should travel freely along the trigger housing and return to the resting position under spring tension without
binding. The bolt stop should also pivot and travel freely without binding or dragging on the receiver or front trigger pin.
Ensure there is no dead slack between the bolt stop release and bolt stop (bolt stop should begin moving as soon as the
bolt stop release is pressed). If there is any binding or dead slack, adjust as necessary until components operate
smoothly.
11. Inspect the trigger pins for looseness. Using a 1/8-in. punch, push on pins with moderate hand pressure. If the trigger
pins are loose, the bottom of the receiver must be staked to secure them.
INSPECTION
1. Inspect safety and trigger for cleanliness.
2. Check the feel of the trigger pull. The trigger pull
should have a clean, crisp brake and the pull weight
should be between three and five pounds. Use a 1/16-
in. hex-head wrench to adjust the fine-tune adjustment
screw (16) to achieve the desired pull weight.
3. Check that the connector, bolt stop, bolt stop release, and sear operate freely and without binding. Replace as required.
4. Ensure that all setscrews are present and a small amount of sealing compound is applied to the tops of the screws to pre-
vent them from loosening from vibration.
5. Ensure that both trigger pins are present and not bent.
6. Check the function of the safety and check for excessive play on the safety arm. With the bolt cocked and the safety set
in the “SAFE” position, the weapon should not fire. When the safety is moved to the “FIRE” position, the weapon
should fire when the trigger is pulled. If required, disassemble the safety mechanism and bend the safety spring to
increase tension.
7. Replace parts that are unserviceable.
M40-058
16