Brownells 75th Anniversary - A Shooting Heritage

A Dedicated Colt Upper for Your Gun Build

No matter what AR is on the market, there's nothing quite like a genuine Colt. Now, you can complete your perfect dream gun build by picking up this nearly complete Colt M4 Upper Receiver, which includes the same SOCOM-profile barrel designed for use by the U.S. armed forces.

Each Colt M4 Upper Receiver is chambered in 5.56 NATO and features a flattop-style design that allows for the easy addition of mounted optics. Just like the M4A1 rifles in use by the U.S. Military, this upper receiver features a pinned front sight gas block. The barrel measures 14.5 inches long and features a 1:7-inch twist rate, which will handle the heavy bullets you like.

Be aware that this Colt M4 Upper Receiver does not include a rear sight, bolt-carrier group or charging handle, which gives you a chance to find the perfect options to complete your rifle.


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Cartridge: 5.56 mm NATO

Finish: Black

Style: Assembled

Contour: Socom

Length: 14.5"

Muzzle: 1/2-28, ...

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