The Colt Enhanced Patrol Rifle 5.56 NATO carbine pairs a 14.5-inch barrel with a permanently pinned and welded muzzle device that brings it to 16.1 inches (Colt part no. CR6921-EPR-PW). That gives a buyer the handling of a 14.5-inch M4-pattern carbine in a configuration that ships and transfers as a standard rifle. The barrel is cut with a 1:7 twist, which stabilizes the full range of 5.56 NATO bullet weights, and the rifle feeds from 30-round magazines. It comes without sights, leaving the top rail open for the optic you already run. For patrol, home defense or a serious range carbine, this Colt build is a direct path to proven Colt hardware.

Key Specifications

• The chambering is 5.56 NATO, the cartridge the M4-pattern carbine was designed around.
• The barrel is 14.5 inches with a pinned and welded muzzle device that brings its permanent length to 16.1 inches.
• Rifling twist is 1:7, suited to heavy and long-for-caliber 5.56 bullets as well as standard loads.
• Magazine capacity is 30 rounds, the standard AR-15 load.
• One 30-round magazine is included, so it is ready to load out of the box.
• The action is semi-automatic, running Colt’s direct gas impingement operating system.
• It ships with no sights installed, leaving the rail clear for a red dot, prism or magnified optic.
• The barrel is chrome lined, Colt’s long-standing standard for corrosion resistance and service life under heat.
• The bolt is high-pressure tested and magnetic particle inspected, the HP/MPI process Colt applies to its carbine bolts.
• It accepts standard AR-15 pattern magazines, so spares are easy to source.

Frequently Asked Questions

Can the muzzle device be removed? No. The muzzle device is pinned and welded to the 14.5-inch barrel, which makes the 16.1-inch length permanent. That is what lets the carbine keep 14.5-inch handling at a standard rifle length.

Does it come with sights? No. It ships without sights so you can mount the optic or backup irons you prefer.

Will it fire .223 Remington? Yes. A 5.56 NATO chamber safely fires .223 Remington as well as 5.56 NATO ammunition.

Buy the Colt Enhanced Patrol Rifle 5.56 NATO Carbine, Pinned 16.1-Inch

Pinning and welding the muzzle device is the cleanest way to get a 14.5-inch carbine’s balance on a rifle-length barrel, and Colt does it at the factory. Order it with our other semi-auto rifles from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.