Impact resistance
The ArmorBlock matrix absorbs and dissipates energy from repeated small-arms fire. It eliminates the spalling and unpredictable fragmentation seen in conventional concrete and reduces dependence on costly steel liners.
Training Products · Indoor Small Arms Range
Indoor Small Arms Range (ISAR)
Indoor ranges demand an envelope that protects shooters, instructors and facility staff while surviving continuous live fire. Amidon ArmorBlock delivers a structural and ballistic solution that outperforms legacy precast, steel-lined walls and SACON products.
Amidon ArmorBlock is a purpose-built ballistic concrete block engineered from the ground up for live-fire interiors. Each block carries the mass, density and toughness needed to stop and contain high-velocity rounds. Shot-to-shot performance is consistent, even in high-volume training environments. Walls stay intact. Maintenance stays low. Safety margins stay high.
The legacy problem
Sustained fire finds the weak point in standard construction.
Indoor ranges take a different kind of punishment than a shoot house — sustained, repeated fire into the same backstop zones, lane after lane, year after year. Standard CMU-and-steel-liner construction, the traditional approach, tends to spall and crack under that sustained impact: the steel liner does the ballistic work, and the masonry around it isn’t built to take the same punishment. Over time that shows up as cracking, ricochet risk, and rising repair costs.
ArmorBlock is purpose-built rather than adapted from general construction material — high density, engineered for consistent multi-hit performance rather than degrading after the first few impacts.
A better range envelope
ArmorBlock solves the problems architects and range integrators face in ISAR projects.
Predictable ballistics
Every block is produced to meet strict density and compressive strength targets, giving the design team clear calculations for setback, stand-off and containment.
Quiet & controlled environment
High inherent mass improves sound control and reduces vibration — a better experience for shooters and a more manageable environment for instructors.
Simplified construction
ArmorBlock installs like standard CMU. No special forming, no multi-stage steel fabrication — keeping ISAR construction schedules tight and cost exposure low.
Higher lifespan
Legacy solutions often depend on sacrificial surfaces that require regular replacement. ArmorBlock withstands heavy use without constant rebuilds, cutting long-term operating costs.
Compliance-ready design
The system is designed around tapered impact zones, backstop geometry, and protected shooter-stall partitions engineered against UFC and USACE ISAR requirements rather than retrofitted to meet them.
What an ArmorBlock ISAR looks like
A true structural envelope, not a thin protective layer.
Architectural layouts built with ArmorBlock rely on a reinforced ballistic envelope that forms:
- Sidewall ballistic containment
- Backstop and tapered impact zones
- Protected mechanical and electrical chases
- Durable control room partitions
- Shooter stalls and separation walls
Each detail benefits from ArmorBlock’s density, strength and buildability. Line-of-fire elements are created as true structural walls rather than thin protective layers added after the fact — giving designers more freedom to optimize geometry for airflow, safety, and range rules. If desired, Amidon can provide conceptual layouts showing typical ArmorBlock wall sections, example stall configurations, and the recommended way to form tapered zones using A-Blocks and H-Blocks.
Why ArmorBlock wins the ISAR mission
Three strategic advantages for program managers and range integrators.
Higher safety margins
The wall system contains rounds where they hit, reducing ricochet concerns and halo damage.
Lower lifetime cost
Less fragmentation leads to fewer repairs, fewer rebuilds, and lower downtime.
Faster path to compliance
ArmorBlock supports the design work needed to meet UFC and USACE ISAR requirements without stacking multiple protective layers that complicate construction.
Indoor ranges are long-term assets. ArmorBlock keeps them that way.
Build an ISAR that holds up to sustained fire.
Talk to our design team about ArmorBlock wall sections, stall configurations, and UFC/USACE-aligned layouts for your indoor range.
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