The Colt EPR II Pro SF3 SBR in 5.56 NATO is Colt’s 11.5-inch Enhanced Patrol Rifle II in Pro trim, set up with a SureFire muzzle device (Colt part no. LE6933-EPRII-PRO-SF3). Colt builds the EPR II from proven TDP components with certified MIL-SPEC materials, coatings and finishes, and the Pro trim adds an ambidextrous magazine catch and safety selector, a Radian Raptor ambidextrous charging handle and a Magpul MOE-K2 grip. The free-float rail gives M-LOK slots in seven orientations under a full-length Picatinny top rail, and Magpul MBUS Pro folding sights ride on top. A Magpul MOE SL buttstock on a QD receiver end plate completes it, and Colt builds the EPR II suppressor-ready. This SF3 version suits a buyer who wants the Pro controls with that muzzle device installed from the start.

Key Specifications

• The chambering is 5.56 NATO, the standard cartridge for the M4-pattern platform.
• Barrel length is 11.5 inches, chrome lined and short enough for vehicles and tight rooms.
• Magazine capacity is 30 rounds, the AR-15 standard.
• The muzzle device is a SureFire unit, the fitting the SF3 in this version’s name designates.
• Controls include an ambidextrous magazine catch and safety selector for left- or right-handed use.
• The charging handle is a Radian Raptor ambidextrous design that works from either side.
• The handguard is Colt’s free-float rail with Magpul M-LOK slots in seven mounting orientations and a full-length MIL-STD-1913 Picatinny top rail.
• Two integrated steel QD sling swivel sockets and anti-rotation tabs complete the rail, so slings attach without extra hardware.
• Sights are Magpul MBUS Pro folding sights, which stay flat under an optic until needed.
• Furniture is a Magpul MOE SL buttstock and MOE-K2 grip on a QD receiver end plate.

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 separates the Pro from the standard EPR II? The Pro adds an ambidextrous magazine catch, a Radian Raptor ambidextrous charging handle, a Magpul MOE-K2 grip, a QD receiver end plate and MBUS Pro sights in place of MBUS 3.

What is the difference between the HUX and SF3 versions? The rifle is the same 11.5-inch EPR II Pro. The HUX version carries a HUXWRX muzzle device and the SF3 version a SureFire device, so pick the one that matches the suppressor mount you run or plan to buy.

Buy the Colt Enhanced Patrol Rifle II Pro SBR, 11.5-Inch SF3

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, and it ships fast to your Class 3 dealer.