The M933/934 High Explosive Cartridges are designed for use with the M120 and M121 120mm Mortar Systems and are used against personnel, bunker and light materiel targets. The 1090 steel projectile is loaded with Composition B explosive. The M933 and M934 are identical with the exception of the fuze. The M934 is equipped with the M734 Multi-Option Fuze which can be set to function in the Proximity, Near Surface Burst, Impact, or Delay mode. The M934A1 is equipped with the M734A1 Multi-Option Fuze. The M933 is equipped with the M745 Point Detonating Fuze which functions in the Impact or Delay mode. Each M933/934 cartridge is packed in a PA153 Fiber Container and two packed rounds are assembled into a PA154 Metal Overpack.
The 120mm mortar will replace the aging, heavy 4.2 inch mortar system currently in use. The M933/934 consists of the following major components:
- Projectile Body Assembly
- M230 Propelling Charge (with M45 Propellant)
- M981 Ignition Cartridge (with M44 Propellant)
- M31 Fin Assembly
- M745 Point Detonating Fuze or M734/M734A1 Multi-Option Fuze
- PA153 Fiber Container
- PA154 Metal Overpack
Propelling
Charge ZoneMuzzle
VelocityMinimum
RangeMaximum
Range0 101 m/s 200 m 1000 m 1 165 m/s 500 m 2500 m 2 220 m/s 850 m 4100 m 3 270 m/s 1200 m 5800 m 4 318 m/s 1600 m 7200 m Maximum Rate of Fire 16 rounds/min (first minute)
Contractor: Valentec Systems, Incorporated (VSI)
Sustained Rate of Fire 4 rounds/min
Cartridge Weight 13.65 kg (30 lb)
Procurement Type: Production
Previous Contracts: 2
Contract Type: Firm Fixed Price
Production Qty: 162680
Scope: Production
Special Provisions: All production in USA by domestic sources.