The Thermal Weapon Sight is a selfcontained lightweight, compact, durable, battery-operated, infrared imaging sensor used for target acquisition. It can be used under conditions of limited visibility such as darkness, smoke, fog, dust and haze, and is effective during daylight hours. The MWTS and HWTS have the same design but the difference lies in the telescope and the software. The system comes with a MIL-STD-1913 rail grabber interface, including a vertical spacer. The MWTS can effectively engage targets out to 1,100 meters while the HWTS can effectively engage targets out to 2,200 meters. The U.S. Marine Corps is procuring both the Medium Weapon Thermal Sight (AN/PAS-13D (V)2) and the Heavy Weapon Thermal Sight (AN/PAS-13D (V)3).
The AN/PAS-13D (V) 2 can be mounted on the M240B Machine Gun and the M249 series. The AN/PAS-13D (V) 3 can be mounted on the M16A1/A2 Rifle, M4 series, M2 Machine Gun, and the MK19 Machine Gun.
These items are replacing the AN/PAS-13B (V) 2 Medium Weapon Thermal Sight (MWTS) and (V) 3 Heavy Weapon Thermal Sight (HWTS).
The Thermal Weapon Sight (TWS) is a lightweight, low power, high performance forward looking infrared (FLIR) device that will augment existing crew-served night vision sights. TWS is completely passive and although primarily designed for target detection and engagement with individual and crew-served weapons, it can also be utilized for all weather surveillance. The U.S. Marine Corps is procuring both the Medium Weapon Thermal Sight (AN/PAS-13B (V) 2) and the Heavy Weapon Thermal Sight (AN/PAS-13B (V)3). The MWTS can effectively engage targets out to 1000 meters while the HWTS can effectively engage targets out to 2000 meters.
The MWTS will be mounted to the M249 Squad Automatic Weapon (SAW) and M240G Medium Machine Gun. The HWTS is intended to be mounted to the M2 .50 cal Heavy Machine Gun, and MK19 40mm Machine Gun.
These items are being replaced by the AN/PAS-13D (V) 2 Medium Weapon Thermal Sight (MWTS) and (V) 3 Heavy Weapon Thermal Sight (HWTS)
The M122 tripod is used with the M240 series machine guns, and can also be used with the M249 SAW. The M60 was originally going to be used on an experimental M91 tripod, but the updated M2 design was selected over it in 1950s.
- Mortar Assembly: 35 pounds (15.89 kg)
- Bipod: 26 pounds (11.80 kilograms)
- Baseplate: 25.5 pounds (11.58 kilograms)
- Sight Unit: 2.5 pounds (1.14 kilograms)
- Total: 89 pounds (40.41 kilograms)
Maximum effective range: 5700 meters
Minimum Range: 80 meters
- Maximum: 33 rounds per minute
- Sustained: 16 rounds per minute
Unit Replacement Cost: $24,717
- M253 Cannon Assembly (35 lbs)
- M177 Bipod Assembly (27 lbs)
- M3A1 Baseplate (25.5 lbs)
Features: The M252 81mm Medium Extended Range Mortar is a crew-served, medium weight mortar which is highly accurate and provides for a greater range (4,500 meters to 5,650 meters) and lethality than the previous 81mm mortar. The cannon has a crew-removable breech plug and firing pin. The muzzle end has a short tapered lead-in which acts as a blast attenuator device. The breech end is finned for better cooling. This mortar also uses the standard M64 mortar sight of the 60mm mortar, M224.
Background: This mortar replaced the previous Marine Corps 81mm mortar in 1986. The M252 is an adaptation of the standard British 81mm mortar developed in the 1970s. It is mostly commonly found in the mortar platoon of an infantry battalion.
Length: 40 inches (101.6 centimeters)
Weight: 46.5 pounds (21.11 kilograms)
Bore diameter: 60mm
Maximum effective range: 2.17 miles (3490 meters)
- Maximum: 30 rounds/minute
- Sustained: 20 rounds/minute
Unit Replacement Cost: $10,658
- M225 Cannon Assembly (14.4 lbs)
- M170 Bipod Assembly (15.2 lbs)
- M7 Baseplate (14.4 lbs)
- M8 Auxiliary Baseplate (3.6 lbs)
Mission: To provide the company commander with an indirect-fire weapon.
Features: The M224 60mm Lightweight Mortar is a smooth bore, muzzle loading, high-angle-of-fire weapon. The cannon assembly is composed of the barrel, combination base cap, and firing mechanism. The mount consists of a bipod and a base plate which is provided with screw type elevating and traversing mechanisms to elevate/traverse the mortar. The M64 sight unit is attached to the bipod mount via a standard dovetail. An additional short range sight is attached to the base of the cannon tube for firing the mortar on the move and during assaults. It has a spring-type shock absorber to absorb the shock of recoil in firing.
Background: The M224 replaced the older (WWII era) M2 and M19, 60mm Mortars. These weapons only possessed 2,200 yards of effective range. The M224 was designed to fire all types of the older ammunition, but its primary rounds are of the newer, longer-range type.
Length: 43.1 inches (109.47 centimeters)
- Gun: 72.5 pounds (32.92 kilograms)
- Cradle (MK64 Mod 5): 21.0 pounds (9.53 kilograms)
- Tripod: 44.0 pounds (19.98 kilograms)
- Total: 137.5 pounds (62.43 kilograms)
Muzzle velocity: 790 feet (240.69 meters) per second
Maximum range: 2200 meters
Maximum effective range: 1600 meters
- Cyclic: 325-375 rounds per minute
- Rapid: 60 rounds per minute
- Sustained: 40 rounds per minute
Unit Replacement Cost: $13,758
The M240B is equipped with an integrated optical rail feed cover and a handguard with heat shield to provide thermal protection to the operator.Manufacturer: Fabrique Nationale Manufacturing, Inc.
Length: 47.5 inches (120.65 centimeters)
Weight: 24.2 pounds (10.99 kilograms)
Bore diameter: 7.62mm (.308 inches)
Maximum effective range: 1.1 miles (1.8 kilometers) on tripod mount
Maximum range: 2.31 miles (3.725 kilometers)
Rates of fire:
- Cyclic: 650-950 rounds per minute
- Rapid: 200 rounds per minute
- Sustained: 100 rounds per minute
Unit Replacement Cost: $6,600