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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 South Carolina?
Yes. It ships to a licensed FFL dealer in South Carolina; you pick it up there after the background check. South Carolina buyers pick this up at a licensed dealer after a NICS check, with no permit and no waiting period; dealers sell rifles and shotguns from age 18.
Is it in stock?
Yes, at $1015.44. Orders leave within 1-2 business days; shipping is free over $999.

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