Colt M5 Carbine CM556-16-M5S | 5.56 NATO | 16.1″

The Colt M5 Carbine (CM556-16-M5S) is a modern sporting rifle built around redesigned upper and lower receivers that provide full ambidextrous controls and an enhanced rigid upper-rail design. It uses a proven carbine-length gas system and a purpose-designed free-float M-LOK handguard to combine modularity with reduced weight. Folding low-profile front and rear sights and a 30-round detachable magazine make it suited to extended range sessions and practical training.

Suggested optic pairing: a compact low-power variable optic such as the Vortex Strike Eagle 1-6×24 offers a versatile sighting solution under $1,000 that complements the M5 Carbine for both close-to-mid-range work and deliberate precision at typical carbine distances.

Product Specifications

• The caliber is listed as .223 Rem / 5.56 NATO.
• The barrel measures 16.1 inches and is free-floating with a 1:7 twist.
• The rifling twist rate is 1:7 inches (right-hand), 6 grooves.
• The action is semi-automatic.
• The magazine capacity is 30 rounds and one 30-round magazine is included.
• The receiver material is 7075-T6 aluminum with a black hardcoat anodized finish.
• The handguard is a 15″ free-float M-LOK style for accessory mounting.
• The stock is a collapsible Magpul CTR (6-position) configuration.
• Standard sights are flip-up folding front and rear low-profile units.
• The grip is a Government A2 style grip.
• The muzzle is fitted with a flash hider.
• The firearm includes full ambidextrous lower controls.
• The receiver description is matte black.
• The series is identified as Carbine Sentry (M5).
• The UPC is 098289020673.

The Colt M5 Carbine blends familiar AR-pattern ergonomics with updated control layout and a robust rail system for users who prioritize modularity and straightforward function. Its combination of an ambidextrous lower, M-LOK tooling, and folding sights supports a wide range of configurations for target practice, competition-style drills, or extended-range training sessions. The rifle’s parts and layout make it easy to adapt to optics, lights, and other common carbine accessories while maintaining an uncluttered, serviceable platform.

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