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The LE6940 and LE6945 Upper Receiver Groups offer and upgrade over the traditional M4 setup.  The LE6940 features Colt’s monolithic upper receiver, which provides a one piece Picatinny top rail and rigid mounting surfaces all around, in addition to a completely free floated barrel.  Built-in flip-up front sight is compatible with most standard height rear sights.  Available with 16” or 10.3” chrome lined, 1-7 twist, button rifled barrel.  Available with or without a charging handle, bolt carrier group, and back up sights. All NFA rules apply.


AR-15, Issue:11, Page:003
Big Book Catalog, Issue:72, Page:003

COLT - M4 5.56 COMPLETE MONOLITHIC UPPER RECEIVER GROUPS

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Cartridge: 5.56 mm NATO

Finish: Black

Style: Complete

Length: 16"

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Cartridge: 5.56 mm NATO

Finish: Black

Style: Complete

Contour: Carbine

Length: 16"

Muzzle: 1/2-28, ...

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Out of Stock

Cartridge: 5.56 mm NATO

Finish: Black

Style: Complete

Contour: Carbine

Length: 10.3"

Muzzle: 1/2-28, ...

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Cartridge: 5.56 mm NATO

Finish: Black

Style: Complete

Contour: Carbine

Length: 10.3"

Muzzle: 1/2-28, ...

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Out of Stock

Cartridge: 5.56 mm NATO

Finish: Black

Style: Complete

Length: 11.5"

Muzzle: 1/2-28

Twist: 1-7

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Out of Stock

Cartridge: 5.56 mm NATO

Finish: Black

Style: Assembled

Length: 11.5"

Muzzle: 1/2-28

Twist: 1-7

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Out of Stock

Cartridge: 5.56 mm NATO

Finish: Black

Style: Assembled

Length: 14.5"

Muzzle: 1/2-28

Twist: 1-7