instructions on how to use the gauge.
The operator must also select automatic or
semiautomatic firing; automatic is the normal mode of
operation. The mode of operation is determined by the
automatic firing, the bolt-latch release must belocked in
the DEPRESSED position by the bolt-latch-release
lock. To engage the bolt-latch-release lock, first depress
the bolt-latch release. Then turn the bolt-latch-release
lock counterclockwise until it hooks and retains the
bolt-latch release in the DEPRESSED position.
To load the weapon, with the cover closed insert the
feedway until the first round is held by the belt-holding
the way to the rear and release it. With the bolt-latch-
release lock positioned to engage the bolt-latch release,
the bolt and retracting slide handle will move forward
under pressure of the driving spring group, thus half-
loading the gun. If the bolt-latch release is up and free of
the bolt-latch-release lock, the bolt latch will hold the
bolt to the rear. Push the retracting slide handle all the
Figure 2-41.--Headspace and timing gauge.
way forward (before releasing the bolt); then press
down on the bolt-latch release to let the bolt go forward.
Figure 2-43.--First round held in feedway by belt-holding
Figure 2-42.--Bolt-latch release free of the bolt-latch-release