Fourth. Fall in is executed with the rifle at the order arms. Fall out, rest, and at ease are executed as without arms. On resuming attention the position of order arms is taken.
Fifth. If at the order, unless otherwise prescribed, the rifle is brought to the right shoulder at the command march, the three motions corresponding with the first three steps. Movements may be executed at the trail by prefacing the preparatory command with the words at trail, as, 1. At trail, forward, 2. MARCH; the trail is taken at the command march.
When the facings, alignments, open and close ranks, taking interval, and assemblings are executed from the order, raise the rifle to the trail while in motion and resume the order on halting.
Sixth. The rifle is brought to the order on halting. The execution of the order begins when the halt is completed.
Seventh. A disengaged hand in double time is held as when without arms.
Fig. 2, par. 92.
92. The following rules govern the execution of the manual of arms:
First. In all positions of the left hand at the balance (center of gravity) the thumb clasps the rifle; the sling is included in the grasp of the hand. (Figs. [6], [12].)