HM Defense StealthMS3

The HM Defense Stealth MS3 is an ultra-compact 5.56 NATO platform purpose-built for discreet carry, vehicle operations, and confined-space engagements. Featuring an extremely short 3-inch Monobloc barrel, the MS3 represents the most compact offering in the Stealth series, prioritizing maximum concealability and rapid deployment while retaining AR-15 operating familiarity.

This platform is best suited for specialized law-enforcement roles where traditional carbines or even SBRs are impractical due to size constraints.

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Operational Advantages for Law Enforcement

 

• Extremely small overall footprint for covert transport and vehicle storage

• Patented Monobloc barrel system improves durability and gas system alignment

• Optimized for suppressed use to mitigate blast in confined spaces

• Standard AR-15 manual of arms, reducing training time

• Supports modern optics, lights, and aiming devices

• Purpose-built for specialized and protective operations

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Barrel System

 

• 3″ 4150 chromoly steel barrel

• Caliber: 5.56 NATO / .223 Remington

• Patented Monobloc design with integral gas block

• ½×28 threaded muzzle

• Engineered for ultra-short barrel reliability and gas efficiency

The Monobloc barrel eliminates traditional gas block attachment points, increasing durability and reliability in extreme short-barrel configurations.

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Upper & Lower Receivers

 

• Forged 7075-T6 aluminum

• Type III hard-coat anodized finish

• Flat-top Picatinny upper receiver

• Mil-Spec lower receiver for parts compatibility and serviceability

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Bolt Carrier Group

 

• M16-profile bolt carrier group

• HM Defense patented HMB Bolt, engineered to enhance bolt strength and service life under extreme operating conditions

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Handguard & Accessory Integration

 

• Compact free-float aluminum handguard

• Picatinny top rail for micro-optics

• M-LOK mounting surfaces for low-profile accessories

• Designed for minimal snag and rapid presentation

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Controls & Ergonomics

 

• Mil-Spec fire control group

• Standard AR controls for immediate familiarity

• QD sling-ready end plate

• Ultra-compact ergonomics support one-handed or confined-space manipulation

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Weight & Handling

 

• Extremely lightweight, minimal-profile configuration

• Optimized for concealment, transport, and rapid deployment

• Designed for specialized operational roles rather than sustained engagements

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Suppressor & Tactical Integration

 

• Threaded muzzle supports suppressor use

• Typically configured with a suppressor to reduce blast and signature

• Compatible with night-vision devices, IR lasers, and duty optics

• Gas and buffer systems tuned for agency-approved ammunition and suppressor setups

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Specifications

 

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Agency Use Case Summary

 

The Stealth MS3 is best suited for:

• Covert and protective operations

• Plainclothes and undercover units

• Vehicle-borne deployment

• Discreet transport platforms

• Specialized, niche tactical roles

• Suppressed close-quarters environments

Note: Due to the extreme short-barrel configuration, this platform is intended for specialized agency applications and should be evaluated with agency-approved ammunition, suppressors, and mission profiles.