120mm M120A1 Towed
The M120A1 Towed System consists of the following components: M298 Cannon (tube), M191 bipod,
M9A1 baseplate, and the M67 sight unit. The M120A1, when transported on the M326 Mortar Stowage Kit,
is primarily towed by a High Mobility Multi-Wheeled Vehicle (HMMMV).
Both 120mm mortar system configurations use graphic scales, M16 and M19 plotting boards, and firing
tables. Ballistic calculations are accomplished with the M150/M151 Mortar Fire Control System-Dismounted
or M32 Lightweight Handheld Mortar Ballistic Computer. The system is compatible with the M2 aiming circle,
M45 series boresight equipment, M14 aiming posts, and the M58/59 aiming post lights. The M150/M151 Mortar
Fire Control System-Dismounted is currently being fielded which will enable digital coordination of multiple
systems and fire support networks, significantly reducing the time required to emplace, fire and displace
the weapon.
General Information
| Tech Manuals | TM 9-1015-256-13&P; |
| Field Manuals | FM 23-90, FM 23-91, FM 7-90 |
| NSN | 1015-01-554-0749 (EIC: 4SN) |
Physical Characteristics
| M120A1 Mortar System | 317 lbs in firing position. |
| M298 Cannon | Weight 110 lbs., Length 69 in. |
| M191 Bipod Assembly | Weight 68 lbs., 78 lbs with bipod leg extension assembly. |
| M9A1 Mortar Baseplate | Weight 136 lbs. |
| M67 Sight Unit (with M58/M59 Aiming Post Lights) | Weight 4 lbs. |
| Elevation | Minimum 710 mils, Maximum 1510 mils. |
| Range | Minimum 200 meters, Maximum 7,200 meters. |
| Rate of Fire Maximum (for 1 minute) | 16 rounds/ Sustained 4 rounds/min. |
| Deflection | 136 mils Right or left of center, 316 mils with traversing extension. |
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