RMB-90 MAASS

RMB-90 Multirole Antiarmor/Anti-Structure System)
T57 rifle prepared to fire on range
Type	Multirole Recoilless Rifle system
Place of origin	Meridon
Service history
In service	1986-present
Used by	Meridon Defense Forces
Production history
Designer	Damean Industrial Group
Manufacturer	Damean Industrial Group
Produced	1984-present
Specifications
Weight	15.1 lbs (unloaded) 29.4lbs (loaded)
Length	28 in (unloaded) 54 in (loaded)
Caliber	85mm
Muzzle velocity	750-850 ft/s (non-boosted)
Effective firing range	1,200ft to 1,500ft vs moving targets 1,800ft vs stationary targets 3,000ft using smoke/illumination/area effect rounds Up to 8,500ft using laser-guided/rocket-boosted ammunition)
Sights	Iron sights and 4x magnification day sights, optional night/thermal sights available

The RMB-90 Modular Anti-Armor/Structure System (MAASS) is a Meridonian 85mm multirole shoulder-fired recoilless rifle, developed by Damean Industrial Group for the Meridon Defense Forces. Replacing older Great-War era surplus and upgrades, the RMB-90 was developed to provide a one-size-fits-all solution for tactical level, manportable, infantry assault and antitank support weapon systems. The RMB-90 is unique in its weight and size reduction measures, including the canisterization of its rounds, allowing for rapid reloading and a relatively compact size. It has proved durable and popular in the Defense Forces and is a staple of all infantry-level formations.

Overview

MAASS is a 85mm recoilless rifle system split into a gun firing unit, or simply gun unit, and round canisters. The gun unit consists of the rifled launch tube, trigger and grip assembly, picatinny mounts with iron sights, breech mount, and side-barrel spotting rifle system. The picatinny mount normally fits a purpose-built 4x magnification day optic, but can also fit most compatible scopes and sights including night vision and thermal optics. The spotting rifle is mounted to the right hand side of the rifle and fires a ballistically-matched and specially-produced cartridge that is used to help guide gunners onto targets before engaging with an actual round. Later variants include a detachable electronic ballistic computer which includes a laser rangefinder linked to an enhanced day/night optic to allow for ranging and adjustment prior to the expenditure of a spotting or actual round. 85mm rounds are provided in canisterized containers that affix directly to the rear of the gun unit and are discarded after every use.

MASS fields a wide variety of rounds to fit with its multirole purpose.

Available rounds

• AFH-600T PRAC- Ballistically matched chalk training round
• AFH-601 HECT- High-explosive counter-tank.
• AFH-602 HE- High-explosive.
• AFH-610 CIFRAG- Counter-infantry fragmentation, produces an impact-based flechette impact.
• AFH-615 CS- Counter-structure, optimized for anti-structure work.
• AFH-616 SMOK- Area white smoke.
• AFH-617 ILUM- Illumination/flare, available in white, yellow, red, and green variants.
• AFH-624 HEDP- High-explosive dual purpose.
• AFH-630 EHECT- Tandem-charge anti-tank munition, Enhanced High Explosive Counter Tank.
• AFH-632 MPU- Multipurpose Urban, optimized for dual-role use within confined spaces.
• AFH-634 HECT- Improved High-Explosive Anti-Tank round for enhanced penetration of more modern armor.
• AFH-645 GACT- Guided/assisted antitank, rocket-propelled, laser-guided antitank round.

Users

• Meridon- In service with the Meridon Defense Forces.