The Colt LE6921 (brand part no. CR6921) is a 5.56mm M4 Carbine-pattern short-barrel rifle built on Colt’s law-enforcement platform with a 14.5-inch barrel and semi-automatic action. Colt finishes the LE6921 in matte black and ships it with a 30-round magazine. The LE6921 favors shooters who want the proven M4 platform in a shorter, NFA-registered configuration.

Key Specifications

• Chambered in .223 Rem/5.56 NATO.
• Wears a 14.5-inch barrel.
• Feeds from a 30-round magazine.
• Operates as a semi-automatic action.
• Finished in matte black.

Frequently Asked Questions

Is this an NFA item? Yes. As a short-barrel rifle, it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What caliber does it fire? .223 Rem/5.56 NATO.

How long is the barrel? 14.5 inches.

Buy the Colt LE6921 M4 Carbine SBR

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4 and transfer through a licensed NFA (SOT/Class 3) dealer, with no federal transfer tax and an extended federal approval wait before delivery. Order through Colt‘s short-barrel rifles lineup and our Lubbock, Texas team will walk you through the transfer process.