ALPS™ Cover
ALPS™ (Arming Lever Paddle Shifter) Cover enables single-handed safing with a highly visible red ARM indicator and a quick-release locking pin. Compatible with all M134-pattern systems.
P/N HG-1120
M134HG: The Modernized M134 Minigun
The M134HG is High Ground Defense's flagship 7.62x51mm NATO electrically driven Gatling gun system. Designed for complete compatibility with legacy M134 platforms, it incorporates six operator-driven engineering improvements that enhance reliability, simplify maintenance, and address long-standing operational challenges.
Request Capability BriefM134HG Specifications
Every system is engineered, manufactured, assembled, and validated through live-fire acceptance testing in Scottsdale, Arizona before delivery. The M134HG is chambered in 7.62x51mm NATO and fires from standard M13 disintegrating-link ammunition at operator-selectable rates of 1,700 or 3,000 rounds per minute. Designed for reliability, maintainability, and full compatibility with legacy M134 platforms, the M134HG is available in multiple configurations to meet a wide range of mission and integration requirements.
The specification table below provides current performance, dimensional, and operating data, including system weight, barrel options, service life, environmental operating limits, warranty information, and available system components. Configuration-specific dimensions and weights are identified where applicable.
| Performance | |
|---|---|
| Caliber | 7.62x51mm NATO, linked (M13 links) |
| Firing rate | 1,700 / 3,000 rpm, operator selectable |
| Max effective range | 1,200 m |
| Operation | Electric drive, mechanical operation |
| Electrical requirement | 28 VDC, 58 amps |
| Dimensions + Weights (by configuration) | |
| Length, crew served | 38.75 in (98.4 cm) |
| Length, fixed forward | 33 in (83.8 cm) |
| Weight, complete with feeder and universal brass link exhaust | 70 lbs (31.8 kg) |
| Weight, gun complete, minus feeder | 58 lbs (26.3 kg) |
| Barrels + Service Life | |
| Barrel | 22 in (55.8 cm) standard, 2.48 lbs (1.2 kg) each, 4 grooves, RH twist, counterclockwise rotation. Options: 22 in heavy, 18 in short |
| Barrel life | 100,000 rounds (average per set) |
| Gun life | 1,500,000 rounds |
| Bolt assembly life (set of 6) | 250,000 rounds |
| Feeder/delinker life | 1,500,000 rounds |
| Environment + Warranty | |
| Operating temperature | -40 to +160 F (-40 to +71 C) |
| Warranty | Backed by an industry-leading warranty. |
| System Components | |
|---|---|
| Ammunition magazine, full | 211 lbs (95.7 kg) |
| Ammunition magazine, empty | 26.5 lbs (12 kg) |
| Feed chute, 6 ft | 5 lbs (2.3 kg) |
| Booster | 6 lbs (2.7 kg) |
| Round repositioner | 1.2 lbs (0.54 kg) |
| Battery, lead acid (AGM), P/N D8565/11-1, 10 Ah, 24.0 VDC | 34.8 lbs (15.8 kg) |
| Battery, lithium-ion, P/N HG-7550, 17 Ah @ 23 C, 26.4 VDC | On request |
Operator-Driven Innovations
The M134HG incorporates six operator-driven engineering improvements developed to enhance reliability, simplify operation, and reduce maintenance, each reflecting practical experience gained through years of hands-on work with legacy M134 platforms.
Feeder Door Assembly
Single-door design with an integrated ammunition retaining lever, allowing faster, easier loading while maintaining positive control of the ammunition belt. Compatible with all M134-pattern systems.
P/N HG-3617
Improved Feeder Sprocket
Redesigned sprocket geometry that improves belt engagement and feed reliability with linked ammunition. Compatible with all M134-pattern systems.
All M134-pattern systems
Universal Gun Control Unit
Selectable rates of fire, round counting, ammunition boost control, last-round indication, remote-arm capability, and NVIS-compatible displays. Designed for compatibility with existing M134-pattern spade grips.
NVIS-compatible displays
Quick Disconnect Spade Grip
Rapid, tool-less removal for simplified maintenance and transportation; compatible with most M134-pattern systems.
P/N HG-4510
Improved Barrel Clamp
Self-stabilizing design that improves barrel retention and reduces barrel cluster heat retention during sustained use.
Self-stabilizing designCrew-Served
and Fixed-
Forward
Configurations
The M134HG is available in both crew-served and fixed-forward configurations to support a wide range of air, land, and maritime integration requirements. The crew-served configuration measures 38.75 in (98.4 cm); the fixed-forward configuration measures 33 in (83.8 cm). Depending on configuration, the M134HG weighs 58 lb (26.3 kg) as the gun assembly or 70 lb (31.8 kg) as a complete system with the feeder and universal brass and link exhaust installed.
Configuration-specific dimensions and weights are identified throughout the specifications to provide accurate integration data for each application.
38.75 inCrew-served · 98.4 cm
33 inFixed-forward · 83.8 cm
Rate of Fire
The M134HG features an operator-selectable rate of fire of 1,700 or 3,000 rounds per minute, allowing the operator to balance ammunition consumption, barrel life, and mission requirements without tools or disassembly.
Lo Rate1,700Rounds per minute
Sustained rate, operator selectable.
Hear 1,700 RPMLive-fire audio sample
Hi Rate3,000Rounds per minute
Maximum rate, operator selectable.
Hear 3,000 RPMLive-fire audio sample
Surface Technologies:ArmorLube & Ceramic Coatings
High Ground Defense is the exclusive source for ArmorLube® surface treatment on the minigun platform.
ArmorLube is a three-dimensional Diamond-Like Carbon technology applied using Hollow Cathode Technology through an affiliated, owner-controlled coating provider. This exclusive relationship prevents other minigun manufacturers from utilizing the ArmorLube process.
ArmorLube provides permanent dry lubrication, with a coefficient of friction ranging from 0.06 to 0.15 and a surface hardness of 7 to 12 GPa. The process can be applied to complex internal geometries and deep bores, reducing dependence on liquid lubricants and the contamination risks they introduce in sand, dust, and other harsh operating environments.
For maritime corrosion protection, HGD also utilizes ceramic coatings where they are best suited. ArmorLube and ceramic coatings are assigned according to the specific component, operating environment, and mission requirement rather than positioned as competing technologies. Coating processes are performed through HGD's qualified and controlled supply chain.
PermanentDry lubrication
0.06-0.15Coefficient of friction
7-12 GPaSurface hardness
Deep boreComplex internal geometries
Testing and Acceptance
Every M134HG undergoes live-fire factory acceptance testing prior to shipment. Standard acceptance testing includes a minimum of 100 rounds fired, including one high-pressure proof round for each barrel and its corresponding bolt (six proof rounds total per weapon).
The M134HG design has been validated through more than 700,000 rounds of developmental and qualification testing conducted over three years using ammunition from multiple manufacturers.
Critical components, including bolts and barrels, undergo Non-Destructive Testing (NDT) and must meet established acceptance criteria prior to assembly.
Electronic components are qualified to the applicable requirements of MIL-STD-810G/H for environmental conditions including high and low temperature, sand, dust, salt fog, vibration, and shock. Every manufactured component is supported by a Certificate of Conformance (CoC) for material traceability throughout the manufacturing process.
Air, Land, and Sea
The M134HG is designed for integration across air, land, and maritime platforms, providing a common weapon system adaptable to a wide range of operational requirements.
Air
Rotary-wing door, window, and fixed-forward gunship applications. HGD's fixed-forward configuration measures 33 in (83.8 cm) in length and weighs approximately 58 lb (26.3 kg), well suited for aircraft integration.
Land
Tactical vehicle, turret, pedestal, tripod, and fixed-position mounts, including integration with remote weapon stations (RWS). Suited for force protection, perimeter defense, and counter-UAS applications.
Sea
The M134HG Marinized Weapon System is engineered specifically for maritime environments, with corrosion protection and material selection applied throughout the weapon system. ArmorLube surface treatment and ceramic coatings are utilized where appropriate to maximize corrosion resistance and long-term reliability in saltwater and littoral operating environments.
Training and Field Support
High Ground Defense provides operator and maintenance training to support fielding and long-term sustainment of every weapon system.
Standard training programs include a three-day operator course and a five-day maintenance course, covering safe operation, system familiarization, preventive maintenance, troubleshooting, inspection, and repair procedures. Training can be tailored to customer requirements, platform configurations, and mission profiles.
Beyond initial instruction, High Ground Defense provides ongoing technical support, spare parts, engineering assistance, and product sustainment throughout the service life of the weapon system.
M134HG Frequently Asked Questions
What caliber is the M134HG?
The M134HG is chambered in 7.62x51mm NATO and feeds from standard M13 disintegrating linked ammunition. Barrel configurations include 22-inch standard, 22-inch heavy, and 18-inch short.
What is the M134HG's rate of fire?
Operator-selectable rates of 1,700 or 3,000 rounds per minute, set through the Gun Control Unit (GCU). Dual-rate operation lets the operator balance ammunition expenditure, barrel life, and target effects.
How much does the M134HG weigh?
70 lb (31.8 kg) as a complete crew-served weapon system with feeder and universal brass/link exhaust; the gun assembly alone weighs 58 lb (26.3 kg).
What platforms can integrate the M134HG?
Rotary-wing aircraft, tactical vehicles, fixed-position mounts, remote weapon stations (RWS), and maritime platforms. Mounting, feed, power, and control configurations are tailored to individual platform requirements.
Is the M134HG compatible with existing M134 platforms and accessories?
Yes. The M134HG was engineered for full interchangeability with the legacy M134 pattern, allowing integration with existing mounts, feeders, electrical interfaces, and support equipment while minimizing changes to established platforms.
What quality assurance processes are used during manufacturing?
Every M134HG undergoes documented quality inspections, material traceability, live-fire acceptance testing, proof testing, and Non-Destructive Testing (NDT) of critical components. Every manufactured component is supported by a Certificate of Conformance (CoC).
How is the M134HG available to international customers?
The M134HG is available to qualified international military and government customers through Direct Commercial Sales (DCS), subject to applicable U.S. export laws and regulations. High Ground Defense maintains ITAR compliance, and all international transfers are conducted in accordance with applicable U.S. export licensing requirements. Depending on the purchasing country's procurement process, the M134HG may also be acquired through government-managed procurement programs where authorized. Our team works directly with customers and their procurement representatives to ensure all regulatory, licensing, and documentation requirements are satisfied before shipment.
Our M134HG in Frontof Your Program
Capability Briefs
A capability brief is a working session with HGD's business development and engineering leads, scoped to your platform, your program, and your country's procurement pathway.
We always respond within two business days.
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Compare M134-Class Systems
How to evaluate an M134-class system: criteria, configured weights, and testing evidence.
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