Anpas V Medium Thermal Weapon Sight and Anpas V Heavy Thermal Weapon Sight

The AN/PAS-13 (V2) medium thermal weapon sight (MTWS) and the AN/PAS-13 (V3) heavy thermal weapon sight (HTWS) (Figure 2-34) are silent, lightweight, compact, and durable battery-powered infrared imaging sensors that operate with low battery consumption. (Both the MTWS and the HTWS are referred to henceforth as a singular thermal weapon sight [TWS]). The TWS is capable of target acquisition under conditions of limited visibility such as darkness, smoke, fog, dust, and haze. The TWS operates effectively at night and can also be used during the daytime. The TWS is composed of two functional groups: the telescope (1) and the basic sensor (2).

Two Sight Weapon

Medium Thermal Weapon Sight Heavy Thermal Weapon System

Figure 2-34. HTWS and MTWS models of the thermal weapon sight.

Medium Thermal Weapon Sight Heavy Thermal Weapon System

Figure 2-34. HTWS and MTWS models of the thermal weapon sight.

a. M16A1/A2/A3 Rifle (Figure 2-35). The M16A1/A2/A3 weapon bracket (1) is a standard item in the TWS carrying case. The weapon bracket's threaded rod (2) is inserted through the hole in the carrying handle of the M16A1/A2/A3 and secured with the thumb wheel (3). The Picatinny rail grabber (4) on the bottom of the TWS is then aligned with a notch on the bracket, ensuring the TWS is positioned to accommodate an effective firing position once the eyecup (5) is depressed. Ensure the rail grabber fully rests on the bracket when mounting the TWS or the sight will not retain zero.

M16 Mounting Bracket
Figure 2-35. Mounting TWS on an M16A1/A2/A3.

b. M16A4/M4-Series Weapons (Figure 2-36). The Picatinny style rail grabber with spacer (1) on the bottom of the TWS is aligned with a notch on the integrated rail (2) of the M16A4/M4-series weapons ensuring the TWS is positioned to accommodate an effective firing position once the eyecup is depressed. The TWS will not retain zero if the rail grabber extends beyond the end of the integrated rail when mounted. Tighten the torque-limiting knob clockwise until it clicks twice. Retightening the rail grabber is recommended after a few rounds have been fired to ensure the sight is fully seated. The mounting procedures are identical for the M16A4 and M4-series MWS.

Boresight Targets
Figure 2-36. Mounting TWS on M16A4/M4-series weapons.

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