EOTech ATPIAL (AN/PEQ-15) - ADVANCED TARGET POINTER ILLUMINATOR AIMING LIGHT - Manual (Page 26)

2-4
2.3 MOUNTING PROCEDURES (Continued)
WARNING
Be sure the weapon is CLEAR and SAFE before
proceeding.
NOTE
The ATPIAL may be placed at any position
(forward and aft) on the rail that is most
convenient for the operator. However, the entire
length of the mounting surface must be fully
supported (in direct contact) by the MIL-STD-1913
rail. If the ATPIAL is removed from the rail, the
operator must make note of the position at which it
was boresighted or zeroed, and return it to that
same position in order to ensure that zero is
retained.
1. Loosen the mounting screw on the rail grabber bracket
until the jaws have sufficient space to fit over the weapon
rail.
2. Hold the ATPIAL with the laser apertures facing in the
direction of the muzzle of the weapon.
3. Position the ATPIAL on the rail ensuring the recoil lug is
seated in the desired recoil groove of the rail.
4. While pushing down and forward on the ATPIAL, turn the
mounting screw clockwise as tightly as fingers allow. Use
a screwdriver or similar tool in the slot of the mounting
screw to turn it an additional 1/2 turn.