The Colt Enhanced Patrol Rifle 14.5-inch SBR is the first-generation EPR in 5.56 NATO, built on a 14.5-inch barrel and finished in matte black (Colt part no. LE6921-EPR). The 14.5-inch length is the classic M4 carbine dimension, giving a little more velocity and sight radius than an 11.5-inch rifle while staying shorter than a 16-inch carbine. Colt fits it with Magpul MBUS Pro backup sights and sets it up for 30-round magazines. It runs semi-automatic on Colt’s direct gas impingement system, with a chrome-lined barrel and an HP/MPI-tested bolt. It is a patrol-length Colt for a shooter who wants M4 proportions in a short-barreled rifle.

Key Specifications

• The chambering is 5.56 NATO, the cartridge the M4 platform was built around.
• Barrel length is 14.5 inches, the M4 carbine length that balances handling and velocity.
• Magazine capacity is 30 rounds, the AR-15 standard.
• Sights are Magpul MBUS Pro folding backup sights, which stay down under an optic until needed.
• The finish is matte black, low glare and in keeping with Colt’s duty rifles.
• The action is semi-automatic, cycling through Colt’s direct gas impingement system.
• The barrel is chrome lined, Colt’s standard for corrosion resistance and longevity under heat.
• The bolt is HP/MPI tested, Colt’s high-pressure and magnetic particle inspection.
• The layout is M4 pattern, so standard AR-15 optics mounts, stocks and accessories fit.
• It accepts standard AR-15 pattern magazines, keeping spares easy to source.

Frequently Asked Questions

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

What sights does it come with? Colt fits Magpul MBUS Pro folding sights, which work as primary irons or as backups under an optic.

How does the 14.5-inch barrel compare with an 11.5-inch SBR? The longer barrel gives a bit more velocity and a longer sight radius, while the 11.5-inch rifle is shorter and handier in tight spaces.

Buy the Colt Enhanced Patrol Rifle 14.5-Inch SBR

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Colt‘s short-barreled rifles lineup and our Lubbock, Texas team will handle the transfer.