Colt M4 Carbine Federal Patrol 5.56mm NATO 16in Matte Black Semi Automatic Modern Sporting Rifle – 30+1

Colt M4 Carbine Federal Patrol 5.56 NATO 16 Inch Semi-Automatic Modern Sporting Rifle – FBI-Configured Duty Variant

The Colt M4 Carbine Federal Patrol 5.56mm NATO 16 Inch Semi-Automatic Rifle is a duty-oriented evolution of the Colt M4 platform, configured with enhancements influenced by federal law enforcement requirements, including FBI-requested upgrades.

It builds on the standard M4 architecture while improving modularity and accessory compatibility through modern free-float handguard design and upgraded sights.

Key Features

• Chambered in 5.56mm NATO / .223 Remington

• 30+1 round capacity

• 16-inch barrel

• Semi-automatic direct impingement system

• Geissele MK4 M-LOK free-float handguard

• Magpul PRO flip-up iron sights

• Flat-top AR-style upper receiver

• Standard A2-style grip

• Matte black finish

• 1:7 twist rate barrel

• 6.5 lb weight class

Federal Patrol Configuration

This model is based on Colt’s M4 patrol rifle line, updated with components commonly specified for federal agency use:

• Free-floating M-LOK handguard for modular accessories

• Enhanced sighting system (Magpul PRO BUIS)

• Improved rigidity and accessory mounting capability

These upgrades support modern patrol requirements such as optics use, weapon lights, and mission-specific attachments.

Barrel and Performance

The 16-inch barrel maintains the standard carbine length for maneuverability while preserving effective ballistic performance with 5.56 NATO ammunition. The 1:7 twist rate supports a wide range of bullet weights, including heavier-duty projectiles.

Sights and Optics Compatibility

The rifle includes:

• Magpul PRO folding front and rear sights

These provide a durable backup iron sight system while allowing full use of optics mounted on the flat-top receiver.

Ergonomics and Handling

The rifle retains the traditional AR/M4 control layout with a standard A2 grip and collapsible stock system (typical for the platform). At approximately 6.5 lbs, it balances durability with manageable weight for duty use.

The free-float handguard improves handling by reducing barrel interference from accessories.

Colt Federal Patrol Carbine Specifications

Manufacturer: Colt
Model: M4 Carbine Federal Patrol
Action: Semi-Automatic, Direct Impingement
Caliber: 5.56mm NATO / .223 Remington
Capacity: 30+1 Rounds
Barrel Length: 16 Inches
Gas System: Carbine-length direct impingement
Handguard: Geissele MK4 M-LOK free-float
Sights: Magpul PRO flip-up front and rear
Receiver: AR-style flat-top
Grip: A2-style polymer
Weight: 6.5 lbs
Twist Rate: 1:7
Finish: Matte black
Type: Centerfire

Overall Role

This rifle is best understood as a modernized duty carbine optimized for law enforcement and federal patrol use. It prioritizes accessory compatibility, durability, and optics readiness while maintaining the proven Colt M4 operating system.