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|  MIL-A-48449A(AR)
With conditions of 3.6, the line of
3.9.4.1
Collimation.
sight of the device reticle shall be parallel in elevation with
the base of the dovetail within 0.1 mil and parallel in azimuth
within 0.1 mil to the side (angular surface) of the dovetail
(see 4.6.10).
When the alignment
3.9.4.2 Replacement repeatability_.
device is removed from the reference dovetail mount and
remounted, the device reticle line of sight shall
subsequently
meet the requirements of 3.9.4.1 and shall not have changed
from the original position by more than 0.1 mil (see 4.6.10).
3.9.5
Optical
characteristics.
Using a collimator with the reticle
Parallax.
3.9.5.1
adjusted to be parallax free for a 80 meter target, the parallax
between the reticle and the cross on the alignment device
reticle shall not exceed 0.1 mil (see 4.6.11).
Operability of moving parts.
3.9.6
The alignment device shall meet all
3.9.6.1 Attachment.
functional requirements of this specification when the alignment
device mounting bracket or a suitable substitute is employed
(see 4.6.10).
The latch shall be free to rotate to lock
3.9.6.2 Latch.
the alignment device to the dovetail on the alignment device's
mounting bracket and shall be free to rotate to release the
This requirement shall be met at
boresight from the dovetail.
standard ambient conditions and at the temperatures specified
in 3.8.2 (see 4.6.10).
Illumination.
3.9.7
The reticle marking shall be clearly
Reticle.
3.9.7.1
distinguishable when observed in ambient light conditions
ranging from dusk into night through a 4-power telescope at a
This observation must be made
distance of 10 feet
1 foot.
with and without the use of a 50% neutral density filter (see
4.6.12).
Any part of tritium
3.9.8 External tritium contamination.
shall not be present on the external surfaces of the alignment
device in excess of 1000 dpm/100 sq. cm. subsequent to the
requirements of 3.8.1 through 3.8.4.2 (see 4.6.13).
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