C-BOS — Close - Quarters Blast Overpressure System
An integrated blast-overpressure mitigation system for close-quarters and urban training environments, including explosive-breaching, shoot-house, MOUT, SOUC, and confined-space training facilities.
SDVOSB I U.S.-Based and Manufactured
Built for
Designed to Protect
Close-Quarters / Urban Training • CQB / CQC • MOUT / SOUC • Shoot Houses • Breach Houses • Room Clearing • Dynamic Entry • Explosive Breaching
Breachers • Assault Teams • Instructors • RSOs • Safety Personnel • Training Cadre • Nearby Training Personnel
C-BOS System
C-BOS is EBSS’s facility-level blast-overpressure mitigation system for close-quarters and urban training environments where blast waves reflect from walls, ceilings, floors, corners, doorways, and structural surfaces.
The system uses modular engineering controls to help reduce reflected blast pathways inside explosive-breaching, CQB/CQC, shoot-house, MOUT/SOUC, room-clearing, dynamic-entry, and confined-space training environments.
C-BOS is built to reduce avoidable reflected exposure while preserving realistic training movement, cadence, and safety oversight.
Reflected Blast in Enclosed Training Spaces
Explosive breaching charges and other impulse-generating training events can produce blast overpressure that strikes floors, walls, ceilings, corners, doorways, and equipment before reflecting back into the occupied training space.
In close-quarters environments, room geometry can create reflected waves, localized pressure hotspots, Mach stem effects, and amplified overpressure that are difficult to manage through distance alone.
C-BOS is designed to address these reflected blast pathways at the structural level.
4 psi
DoD interim threshold for blast-overpressure risk-management actions.
15 - 30 psi
Reported reflected-pressure range observed in controlled close-quarters explosive testing.
Mission Reality
How does training cadre increase distance without reducing training realism?
Geometry
Walls, ceilings, floors, corners, and doorways can reflect and amplify blast waves.
C-BOS System Design Principles
Modular
Configured around facility geometry, training use case, and priority exposure zones.
Military-Informed
Designed to support close-quarters and breaching training without compromising the training objective.
Reflection-Focused
Designed to reduce room-returned overpressure by disrupting, redirecting, and dampening reflected blast pathways.
Integrated System
Coordinates wall, ceiling, floor, shield, grate, and dampening elements into one mitigation approach.
C-BOS System Components
C-BOS Dampeners
Blast Overpressure Dampeners
A behind-surface dampening element designed to slow pressure movement and reduce residual pressure pathways behind treated surfaces.
C-BOS Integration
Integrated System Design
C-BOS components are configured together to manage reflected pressure pathways across wall, ceiling, floor, doorway, and breach-adjacent surfaces.
Design Note — C-BOS is not a one-size-fits-all wall covering. It is a facility-informed system configured around the physical geometry and training use case.
C-BOS Shield
Blast Overpressure Shield
A hinged protective barrier designed to deploy before selected breach events to mitigate direct lateral blast exposure, debris effects, and breach-adjacent exposure pathways.
C-BOS Grate
Blast Overpressure Grate
A modular floor-level control designed to reduce hard-surface ground reflection and help manage pressure movement at the ground plane.
C-BOS Tile
Blast Overpressure Tile
Modular wall and ceiling controls designed to disrupt, redirect, and diffuse reflected blast-overpressure pathways.
How C-BOS Works
In close-quarters training spaces, blast overpressure can reflect, combine, and travel across hard surfaces instead of moving in a single clean direction.
C-BOS uses engineered geometry and dampening materials to interact with those reflected pathways — helping break up, redirect, and reduce reflected blast movement.
The result is a physical engineering-control approach for reducing avoidable reflected exposure without changing the core training environment.
C-BOS is not designed to make training easier. It is designed to help keep realistic training sustainable.
By adding facility-level engineering controls into close-quarters and urban training environments, C-BOS helps reduce avoidable reflected blast-overpressure exposure for breachers, assault teams, instructors, RSOs, and training cadre positioned near the event.
Supports realistic close-quarters and urban training
Adds a facility-level mitigation option
Addresses repeated exposure concerns
Fits pilot, retrofit, or new-construction pathways
Protect readiness without softening training.
“DoD has formalized blast-overpressure risk-management requirements and identified breaching charges as a relevant exposure source. C-BOS is designed to address that problem at the facility level.“
Discuss C-BOS Use Case and Facility Fit
C-BOS is configured around the training environment, not forced into a generic layout.
EBSS works with military stakeholders to understand the facility, training use case, breach points, personnel positions, and priority exposure zones before recommending a C-BOS configuration.
Whether the requirement is a single breach room, shoot-house pilot, hallway treatment, or broader close-quarters / urban training facility, EBSS can help evaluate the best starting point for reflected exposure reduction.