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Colt M4 OEM1 Carbine 5.56 NATO Blue/Black Rifle

The Colt M4 OEM1 Carbine is a semi-automatic 5.56 NATO rifle designed for customization on the proven Colt M4 platform. This factory configuration includes a 16.1-inch chrome-lined barrel with a 1:7 twist rate, an A2 front sight base, a flat-top receiver with Picatinny rail, a carbine-length gas system, and a pistol grip. The OEM1 intentionally omits the handguard, buttstock, trigger guard, magazine, and rear sight, giving builders and dealers a flexible starting point for a personalized setup. The rifle uses standard AR-15 magazines and accepts a wide range of aftermarket components.

Key features

  • Colt M4-based semi-automatic rifle chambered in 5.56 NATO
  • 16.1-inch chrome-lined barrel with a 1:7 twist rate
  • A2 front sight base with a flat-top Picatinny receiver rail
  • OEM configuration ready for aftermarket handguard and buttstock installation
  • Carbine-length direct-impingement gas system
  • Accepts standard AR-15 magazines with a 30-round capacity specification

The Colt M4 OEM1 Carbine provides a dependable factory foundation for a customized 5.56 NATO rifle build.

Colt M4 OEM1 Carbine 5.56 NATO Blue/Black Rifle: quick facts

What caliber is the Colt M4 OEM1 Carbine 5.56 NATO Blue/Black Rifle?
It is chambered in 5.56 NATO.
How many rounds does it hold?
30 rounds; magazines included: 0.
How big and heavy is it?
Barrel length 16.1 inches, overall length 32 inches.
What kind of action does it use?
Semi-Automatic.
Is it optic ready or threaded?
Optic ready: Yes; threaded barrel: Yes.
What sights and finish does it have?
Sights: Standard Sights; finish: Blue/Black.
Is it new or used?
New, in the original packaging.
Can I buy it in Connecticut?
Yes. It ships to a licensed FFL dealer in Connecticut; you pick it up there after the background check. Connecticut buyers need a Long Gun Eligibility Certificate or pistol permit, and the Connecticut dealer will only transfer rifles and shotguns that are legal under the state's assault weapon law.
Is it in stock?
Yes, at $1065.46. Orders leave within 1-2 business days; shipping is free over $999.

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