U.S. Small Arms Sights

(Updated 15 February 2012)

AN/PAS-13 (V2) Medium Weapon Thermal Sight (MWTS)

FOV (Narrow): 9 degrees at 3.3x magnification power
FOV (Wide):
15 degrees at 2x magnification power
Dimensions:
15.5” Long, 6.25” Wide, 6.25” High
Weight
: 4.1 pounds
Power Consumption:
12W in ON mode, 5.5W in STANDBY mode.
Battery Life: 10 hours when used in STANDBY mode 71% of the time, and 3.5 hours in EMERGENCY mode.
Notes: The MWTS has three modes of operation: STANDBY, ON, and EMERGENCY. When the system is first turned on, the MWTS begins a cool-down period of about 2 minutes. After the cool-down period, the MWTS enters the STANDBY mode.
During the STANDBY mode, power is not applied to the scanner or display to extend the life of the battery. When the MWTS is in the STANDBY mode and pressure is applied to the eyecup, the MWTS switches to the ON mode, and a switch engages to provide power to the scanner and display. After a three-second delay, the system is fully operational. When the pressure on the eyecup is removed for longer than 30 seconds, the system returns to STANDBY mode.
When switched to the EMERGENCY mode, the MWTS continuously applies power to the entire system. This mode allows the operator to bypass the 3-second delay experienced when switching from the STANDBY to the ON mode. Since power is applied to the entire system while in the emergency mode, battery life is greatly reduced.
(MWTS Perspective View – 88~ kb GIF)
(MWTS Reticle Display – 40~ kb GIF)
References:
FM 3-22.68 Crew Served Machine Guns, 5.56-MM and 7.62-MM (January 2003)

M145 Straight Telescope (MGO)

Weight: 24 ounces (681 grams)
Dimensions:
7 inches (175mm) long
Optics:
28mm Objective Lens, 8.2mm exit pupil, 3.4x magnification with illuminated reticle
Battery Life: 175 hours on average with a fresh battery
Notes: The anti-laser filter can be removed in low-light conditions, improving target detection to a level greater than the naked eye in the same conditions. The M145 must be remain matched with the same weapon and at the same slot on the rail system, or else it must then be re-zeroed.
(M145 Telescopic Sight Side View – 11~ kb GIF)
References:
FM 3-22.68 Crew Served Machine Guns, 5.56-MM and 7.62-MM (January 2003)

AN/PVS-4 Night Sight

Notes: To obtain a precise zero, you are advised to do it at night at a range of 300 meters. You can however use the daylight cover to obtain a less precise zero.
References:
FM 3-22.68 Crew Served Machine Guns, 5.56-MM and 7.62-MM (January 2003)