MechWarrior: A Military Publication for Integration, Application, Selection, Tactics, Techniques and Procedures in Modern Warfare - Chapter 2

\*\*CHAPTER 2\*\*

\*\*SYSTEM DESCRIPTION AND MATERIEL CHARACTERISTICS\*\*

\*\*2-1. Purpose\*\*

This chapter describes the Manned Armored Mobility System (MAMS) as a materiel requirement, defining the performance envelopes, interface standards, subsystem architecture, and modular payload configurations that govern its design, acquisition, and employment. This chapter does not specify commercial products or proprietary solutions. It defines the capability requirements against which any compliant system must be evaluated. Program offices, prime contractors, and systems integrators will use these requirements as the baseline for Technology Readiness Level (TRL) assessment, design-to-cost analysis, and interface control documentation under the Defense Acquisition System.

\*\*2-2. Design Philosophy\*\*

\*\*a.\*\* The MAMS is designed from four non-negotiable operational requirements derived from the capability gap analysis in Chapter 1. First, it must protect its operator against direct small-arms fire through 7.62mm armor-piercing ammunition, rocket-propelled grenade warheads, and first-person-view drone munitions at operationally relevant standoff distances. Second, it must generate direct fires from multiple weapon systems simultaneously while the operator remains within the armored envelope. Third, it must command up to twelve heterogeneous unmanned assets in real time using an onboard sensor fusion architecture that does not depend on an uninterrupted external communications link. Fourth, it must physically breach reinforced concrete walls, fortified doorways, and tunnel entrances using onboard mechanical or explosive means, without exposing the operator to direct fire during the breach operation.

\*\*b.\*\* Every design decision subordinates to these four requirements. Weight, acoustic signature, thermal signature, and unit cost are significant constraints but are secondary to the four primary requirements. A MAMS that cannot protect its operator is a sensor platform. A MAMS that cannot generate fires is a logistics asset. A MAMS that cannot command unmanned assets autonomously under communications denial is a remote-controlled vehicle. A MAMS that cannot breach is an escort. The design philosophy rejects each of those partial solutions and requires all four capabilities to be present simultaneously and operable under the same contested conditions.

\*\*c.\*\* The MAMS is a bipedal/quadrupedal reconfigurable platform. This is not an aesthetic choice or a speculative technology decision. Legged locomotion is the only architecture that satisfies all four primary requirements across the full range of operational environments identified in Chapter 1 — urban rubble, subterranean networks, maritime littoral terrain, and high-altitude mountainous approaches — without requiring trafficable ground surfaces. Wheeled and tracked platforms are operationally superior on prepared or semi-prepared terrain; the MAMS does not compete in those environments. It operates in the environments where wheels and tracks cannot go and where dismounted soldiers currently absorb unacceptable risk.

\*\*2-3. Locomotion Architecture\*\*

\*\*a. Bipedal Configuration.\*\* The MAMS operates in bipedal configuration for direct fire, breach, and close-quarters combat operations. Bipedal stance provides the operator with maximum sensor height, maximum weapons employment range from onboard hardpoints, and maximum manipulator reach for the direct manipulation system (DMS) arm assembly described in paragraph 2-7. Bipedal configuration height shall not exceed 3.2 meters to the top of the sensor mast, ensuring the system remains below standard single-story masonry wall height and can use building corners, rubble, and terrain features as defilade.

\*\*b. Quadrupedal Configuration.\*\* The MAMS reconfigures to quadrupedal stance for movement over severely broken terrain, subterranean operations, and high-wind or high-load stability requirements. Quadrupedal configuration lowers the system's center of gravity, distributes payload mass across four contact points, and reduces the system's radar cross-section and visual silhouette. Transition between bipedal and quadrupedal configurations shall be completable in under eight seconds without operator intervention beyond a single mode-select input.

\*\*c. Locomotion Performance Requirements.\*\* In bipedal configuration, the MAMS shall achieve a sustained cross-country movement speed of not less than 6 kilometers per hour and a burst speed of not less than 12 kilometers per hour on prepared surfaces. In quadrupedal configuration, it shall achieve sustained cross-country movement of not less than 10 kilometers per hour. The system shall be capable of ascending and descending slopes of not less than 45 degrees in quadrupedal configuration. It shall negotiate vertical obstacles of not less than 0.9 meters in bipedal configuration without external assistance. Stair-climbing capability is required in both configurations for structures with standard riser heights of up to 20 centimeters. All locomotion performance requirements shall be demonstrated at the system's maximum combat-loaded weight.

\*\*d. Actuator Requirements.\*\* The actuator architecture shall achieve not less than 150 Newton-meters of continuous torque per primary joint axis at the hip and knee, with a peak torque output sufficient to sustain locomotion on slopes at full combat load and recover from single-leg load failures without falling. Electric actuator architecture is required. Hydraulic actuation is not acceptable due to thermal signature requirements and forward maintenance complexity in austere environments. All actuators shall be replaceable at the field maintenance level without specialized tooling.

\*\*e. System Mass.\*\* The MAMS maximum combat-loaded mass, including operator, all installed subsystems, and maximum weapons payload, shall not exceed 600 kilograms. This constraint is driven by the requirement for rotary-wing transportability on CH-47F class aircraft at not less than two systems per lift, and by structural load requirements on standard military bridging. Programs exceeding this threshold require a waiver from the program executive officer with documentation of the operational trade-off accepted.

\*\*2-4. Crew Station and Operator Interface\*\*

\*\*a. General.\*\* The MAMS operator is positioned within a fully enclosed, armored crew station integrated into the platform's torso structure. The crew station is not a cockpit in the aviation sense — the operator does not control the system's locomotion directly during normal operations. Locomotion is executed by the platform's autonomous balance and path-planning architecture under operator-designated waypoints and mission parameters. The operator's cognitive workload is allocated to the three tasks that require human judgment: target acquisition and engagement authorization, unmanned asset command and coordination, and breach sequencing. All other platform functions are automated.

\*\*b. Situational Awareness Architecture.\*\* The crew station shall incorporate a full-sphere situational awareness display presenting fused sensor data from the MAMS onboard sensor suite and the surrounding unmanned formation in a single integrated battlespace picture. The display architecture shall support head-slaved cueing so that the operator's line of sight determines sensor and weapon orientation without requiring manual slew inputs. The system shall provide not less than 270-degree simultaneous visible-spectrum and thermal imaging coverage without crew station rotation. The remaining 90 degrees shall be covered by the unmanned formation's sensors, integrated into the same display architecture. No sector of the local battlespace shall be uncovered at any time during normal operations.

\*\*c. Control Architecture.\*\* The primary control interface shall support sub-vocal input for high-tempo engagement sequences, supplemented by manual glove-integrated controls for deliberate operations. Sub-vocal input is required because the operator's hands must remain available for weapons and DMS arm control during simultaneous engagement and breach operations. The control architecture shall provide haptic feedback for DMS arm operations to preserve operator dexterity in fine manipulation tasks. All control inputs shall be executable with the operator in full Mission Oriented Protective Posture (MOPP) 4 equipment.

\*\*d. Communications Architecture.\*\* The MAMS shall maintain command authority over its assigned unmanned formation through a primary radio-frequency data link and a fiber-optic backup link deployed from onboard spools to a maximum of 500 meters. The fiber-optic backup is required specifically for operations in high-density electronic warfare environments where radio-frequency communications are denied or severely degraded — a condition documented in both the Donbas and in DARPA assessments of PLA EW capabilities. When operating under communications denial, the MAMS shall maintain autonomous command of its unmanned formation through the onboard AI fusion architecture without any degradation in unmanned asset coordination capability. The system shall not require external network connectivity to execute any primary combat function.

\*\*2-5. Protection Architecture\*\*

\*\*a. Ballistic Protection.\*\* The MAMS primary structural armor shall provide protection against 7.62×51mm M80 ball and M61 armor-piercing ammunition at not less than 100 meters standoff, consistent with NIJ Level IV standards adapted for mobile platform application. The armor architecture shall incorporate ceramic composite materials to meet this requirement within the mass budget defined in paragraph 2-3e. Steel monocoque construction is not acceptable for primary armor at the required protection level within the mass constraint.

\*\*b. Active Protection System.\*\* The MAMS shall integrate a hard-kill active protection system (APS) compatible with the Trophy Medium Vehicle (MV) configuration currently fielded on U.S. Army armored vehicles under the General Dynamics Land Systems indefinite-delivery, indefinite-quantity contract active through mid-2027. The Trophy MV configuration provides detection, classification, and hard-kill engagement capability against recoilless rifles, anti-tank guided missiles, rockets, and rocket-propelled grenades. The APS integration shall not occlude any primary sensor apertures and shall provide 360-degree threat coverage. The APS shall be integrated into the platform's threat warning architecture so that engagement data feeds the onboard AI system for simultaneous target location reporting to the unmanned formation.

\*\*c. Directed-Energy Counter-UAS.\*\* The MAMS shall incorporate a solid-state laser system with a minimum continuous output power of 50 kilowatts for counter-UAS operations. This requirement is derived from operational assessments of FPV drone swarm engagements in the Donbas, where the volume of simultaneous small drone threats at the point of decision exceeds the intercept capacity of kinetic APS systems alone. The directed-energy system provides an effectively unlimited magazine for sequential drone engagements, constrained only by onboard power generation and thermal management. The laser system shall achieve a minimum effective engagement range of 1,000 meters against Group 1 UAS targets and shall be capable of engaging multiple sequential targets without cooldown delay at the power levels required to defeat standard commercial FPV drone airframes at that range.

\*\*d. Electronic Warfare Suite.\*\* The MAMS shall incorporate an onboard electronic warfare suite capable of detecting, classifying, and jamming radio-frequency command links used by commercial UAS in the 900 MHz, 2.4 GHz, and 5.8 GHz bands, as well as military-band frequencies identified in the current threat library. The EW suite shall not transmit on frequencies that would interfere with the MAMS's own communications architecture or with the radio-frequency data links of its assigned unmanned formation. Dynamic frequency deconfliction is required and shall be automated.

\*\*e. Signature Management.\*\* The MAMS thermal signature shall be managed through active cooling of high-emission subsystems and through the use of thermal screening materials on exterior surfaces. The system shall not present a thermal signature distinguishable from standard building heating exhaust at distances greater than 300 meters when stationary in a prepared position. This requirement directly addresses the drone-targeting methodology documented in the Donbas, where thermal signatures from stationary armored vehicles and command nodes have been the primary acquisition method for artillery and loitering munition strikes.

\*\*2-6. Weapons Architecture\*\*

\*\*a. General.\*\* The MAMS weapons architecture is modular. The system provides four hardpoint stations — two shoulder-mounted, one chest-mounted, and one DMS arm-integrated — and a primary direct fire mount on the sensor mast. No single weapons configuration is prescribed. The required capability is the simultaneous availability of anti-armor fires, area suppression fires, counter-UAS fires, and precision breach fires. How those capabilities are achieved across the four hardpoints and the primary mount is a configuration decision made at the unit level based on the operational mission profile.

\*\*b. Required Capability Set — Primary Configuration.\*\* The standard configuration shall provide, as a minimum: one anti-armor guided munition in the class of the Javelin or successor system on a shoulder hardpoint; one loitering munition in the class of the Switchblade 600 on the opposing shoulder hardpoint for beyond-line-of-sight precision strike; one automatic cannon not less than 25mm caliber on the primary direct fire mount for suppression, materiel defeat, and vehicle engagement; and one 7.62mm machine gun on the chest hardpoint for area suppression and personnel engagement at close range. The total weight of the standard weapons configuration, including the munitions load for one standard engagement sequence, shall not exceed 120 kilograms inclusive of mounting hardware.

\*\*c. Directed-Energy Integration.\*\* The 50 kilowatt laser system described in paragraph 2-5c is a dual-role system. In its primary role it is a force protection asset for counter-UAS. In its secondary role it is a directed-energy weapon for precision materiel defeat and dazzling of optical sensors at ranges up to 500 meters. The transition between these roles is a mode-select function and does not require physical reconfiguration. Rules of engagement for the directed-energy weapon in its materiel defeat role are governed by the same human authorization requirement as all other lethal weapons systems, consistent with DoDD 3000.09 (January 2023), which requires that autonomous and semi-autonomous weapon systems "allow commanders and operators to exercise appropriate levels of human judgment over the use of force."

\*\*d. Rules of Engagement Integration.\*\* The MAMS weapons architecture does not permit autonomous lethal engagement against any target. The onboard AI fusion architecture provides target nomination, threat classification, and engagement prioritization recommendations to the operator. All engagement decisions require affirmative operator authorization. This is not a technical limitation — the AI architecture is capable of autonomous engagement in the same way that Trophy APS autonomously intercepts incoming munitions in the force protection role, which is explicitly permitted under DoDD 3000.09 as an operator-supervised anti-materiel system defending a platform with onboard personnel. The prohibition on autonomous lethal engagement against personnel and ground vehicles is a deliberate policy and design decision, not a capability gap. The MAMS's value proposition is precisely that it places a human decision-maker with superior situational awareness at the point of decision, making better lethal force decisions than any current autonomous system can make.

\*\*2-7. Direct Manipulation System\*\*

\*\*a. General.\*\* The Direct Manipulation System (DMS) is a multi-segment manipulator arm integrated into the MAMS torso structure, deployable in both bipedal and quadrupedal configurations. It is the system's primary breach tool and its primary interface with the physical environment for tasks that do not require direct fire. Its design derives from the requirements of subterranean clearance operations, explosive ordnance disposal at standoff, and rubble negotiation in urban terrain.

\*\*b. Performance Requirements.\*\* The DMS arm shall achieve a continuous payload capacity of not less than 50 kilograms at full extension. Reach shall extend not less than 2.0 meters from the torso mounting point in all directions accessible from the bipedal configuration. Force output at the terminus shall be sufficient to apply not less than 500 Newtons of continuous thrust against a fixed object — sufficient to place breaching charges against reinforced concrete, to displace vehicle-weight debris in rubble clearance, and to operate standard military manual handling equipment. Fine manipulation capability is required at the terminus for tasks including fuse removal from improvised explosive devices, operation of standard door hardware, and deployment of fiber-optic sensor cables in confined spaces.

\*\*c. Breach Capability.\*\* The DMS arm is the primary delivery system for mechanical and explosive breach. In the mechanical breach role, it applies the force output described above against standard door frames, masonry block walls, and reinforced doors. In the explosive breach role, it places standard demolition charges — including the M183 demolition charge assembly and the APOBS anti-personnel obstacle breaching system in its charge-deployment mode — at the breach point while the operator remains within the armored envelope. The DMS arm shall be capable of placing breaching charges at a height of not less than 2.5 meters above ground level without platform repositioning.

\*\*d. Sensor Integration.\*\* The DMS terminus shall incorporate a fiber-optic camera capable of deployment through standard 100mm bore openings for subterranean reconnaissance ahead of physical breach. This capability directly addresses the tunnel clearance requirement established in Chapter 1. The camera feed integrates into the operator's situational awareness display and into the onboard AI fusion architecture for 3D environmental mapping ahead of the breach point.

\*\*2-8. Power Architecture\*\*

\*\*a. Primary Power.\*\* The MAMS primary power system shall achieve not less than 450 Watt-hours per kilogram at the cell level in the installed configuration. This performance requirement is achievable with current solid-state battery technology under active development and Army-supported testing. No chemistry or vendor is specified; the requirement is the performance floor. Systems falling below this threshold will not provide the minimum 45-minute sustained combat operations endurance required under the combat power budget defined in paragraph 2-8c.

\*\*b. Secondary Power.\*\* The MAMS shall carry a hot-swap secondary battery module providing not less than 90 minutes of sustained operations at reduced power — specifically, locomotion, sensor operation, communications, and DMS function, without laser or active APS operation. The secondary module shall be exchangeable at the field level in under three minutes without tools. This capability is required to support sustained operations during the battery swap cycle of the primary module, which shall not exceed 15 minutes at the forward logistics element with pre-conditioned replacement modules.

\*\*c. Combat Power Budget.\*\* The system power budget at maximum combat load — bipedal locomotion at 6 kilometers per hour, all sensors active, laser at 50 kilowatts cycled at 30 percent duty, APS active, communications active, DMS arm active — shall not exceed the primary battery's 45-minute endurance at the 450 Wh/kg performance level. Operations at reduced power loads — stationary or low-mobility overwatch with laser and APS on standby — shall extend primary battery endurance to not less than 90 minutes. These figures are combat planning parameters, not manufacturer specifications. They define the sustainment cycle that logistics planners will use to calculate battery resupply requirements.

\*\*d. Forward Power Resupply.\*\* The MAMS battery module is the primary consumable in the sustainment chain. Forward logistics elements supporting MAMS operations shall carry not less than four pre-conditioned replacement primary modules per system per 24-hour operational cycle, based on planning assumptions of four to six sustained engagement periods per day. The S-MET (Squad Multipurpose Equipment Transport) unmanned ground vehicle, currently in HMIF integration testing, is the designated battery resupply platform. The S-MET shall carry pre-conditioned MAMS battery modules as its primary payload in MAMS-supporting configurations.

\*\*2-9. Sensor Suite\*\*

\*\*a. General.\*\* The MAMS sensor suite provides the full-sphere battlespace picture described in paragraph 2-4b. It also provides the sensor data that feeds the onboard AI fusion architecture for target nomination, threat classification, IED detection, and 3D environmental mapping. The sensor suite is divided into onboard sensors and formation sensors. Formation sensors are the sensor payloads of the assigned unmanned assets, integrated into the MAMS display architecture through the communications link described in paragraph 2-4d.

\*\*b. Onboard Sensors.\*\* The minimum onboard sensor suite shall include: full-sphere thermal imaging with not less than 270-degree simultaneous coverage; multi-band radar in the millimeter-wave and short-range ground-penetrating bands for IED wire detection, subterranean void mapping at shallow depth, and air-breathing target detection at ranges to 2,000 meters; acoustic array for gunshot detection, vehicle acoustic signature classification, and subterranean movement detection; and visible-spectrum cameras with low-light enhancement for each sensor-covered sector.

\*\*c. AI Fusion Architecture.\*\* All onboard and formation sensor data shall be processed by the onboard AI fusion system in real time, with target nomination latency — the time between sensor detection and operator presentation of a nominated target with engagement recommendation — not to exceed 1.5 seconds. This latency requirement is derived from the engagement timelines of FPV drone attacks documented in the Donbas, where the interval between drone visual acquisition of a target and warhead detonation has been measured at under four seconds in a significant proportion of documented engagements. The 1.5-second nomination latency leaves the operator not less than 2.5 seconds for decision and engagement authorization at the laser or APS, which is consistent with human decision timelines under high-stress conditions documented in the military psychophysics literature. This is the precise temporal margin within which the operator's cognitive architecture must function — and it is the primary performance requirement that governs the operator selection criteria detailed in Chapter 3.

\*\*2-10. Compatibility and Interface Standards\*\*

\*\*a.\*\* The MAMS shall be compatible with the Joint All-Domain Command and Control (JADC2) architecture and its Army implementation, the Unified Network, as a mobile data node. All sensor data, target nominations, engagement records, and logistics status shall be transmittable to higher echelon command in JADC2-compatible data formats whenever external network connectivity is available.

\*\*b.\*\* The MAMS AI fusion architecture shall be compatible with the Lattice operating system interface standard currently under Army contract for HMIF MUM-T applications. Compatibility does not require exclusive use of any proprietary system; it requires that the MAMS control interface conform to the open architecture data standards that allow Lattice-compatible unmanned assets to receive tasking, return sensor data, and report status to the MAMS operator through the standard communications link.

\*\*c.\*\* The MAMS weapons hardpoints shall accept all munitions currently in the Army inventory in the applicable weight and volume classes without modification. Javelin, Switchblade 600, and successor systems in those classes shall be mountable on the shoulder hardpoints using standard interface hardware. The primary direct fire mount shall accept barrels in the 25mm through 40mm class using a common mount adapter. This modularity requirement is not optional — a MAMS that can only accept proprietary weapons configurations creates a single-source sustainment dependency that is operationally unacceptable.