Colt LE6933-EPRII-SF3-CK 5.56 NATO 11.5" Upper Receiver Conversion Kit with SureFire SF3FH Flash Hider (UPC 098289035684)

The Colt LE6933-EPRII-SF3-CK 5.56 NATO 11.5" Upper Receiver Conversion Kit with SureFire SF3FH Flash Hider (UPC 098289035684) is a factory-assembled, professional-grade upper receiver designed to convert a standard AR-15 lower receiver into a compact and highly capable short-barreled rifle configuration. Built to the Enhanced Patrol Rifle G2 (EPRII) specifications, this conversion kit features a true 11.5-inch barrel and comes equipped with the SureFire SF3FH 3-prong flash hider. The SF3FH serves as both an effective flash suppressor and a quick-detach mounting platform for SureFire SOCOM series suppressors. This upper receiver kit is ideal for law enforcement agencies, tactical teams, and serious shooters who want to add a high-quality, suppressor-ready 11.5" upper to their existing lower receiver without the complexity of building one from individual parts.

Manufactured to Colt’s strict quality standards, the LE6933-EPRII-SF3-CK delivers the reliability, accuracy, and durability that professionals expect from a Colt M4-style upper receiver.

11.5-Inch Barrel for Compact Performance

The 11.5-inch barrel is the foundation of this conversion kit. This barrel length significantly reduces the overall length of the rifle compared to standard 16-inch carbines, greatly improving maneuverability in close-quarters environments, vehicles, and confined spaces. Despite the shorter barrel, the 11.5" length maintains excellent terminal ballistics with 5.56 NATO ammunition at typical defensive and tactical distances. The gas system is properly tuned at the factory for reliable function with this barrel length, whether the rifle is used suppressed or unsuppressed.

SureFire SF3FH 3-Prong Flash Hider

This upper receiver conversion kit comes equipped with the SureFire SF3FH 3-prong flash hider. The SF3FH is one of the most respected and widely used flash hiders in the professional community. It provides excellent flash suppression when the rifle is used without a suppressor and serves as the mounting interface for SureFire SOCOM series suppressors. The robust 3-prong design is highly durable and maintains precise alignment even after heavy use. Its quick-detach capability allows operators to rapidly attach or remove a suppressor without tools, making this upper an outstanding choice for users who frequently switch between suppressed and unsuppressed configurations.

Enhanced Patrol Rifle G2 Specifications

The LE6933-EPRII-SF3-CK is built to Colt’s Enhanced Patrol Rifle G2 standards. This includes a properly tuned gas system for short-barrel reliability, a high-quality bolt carrier group, and other refinements developed from extensive feedback by law enforcement and military users. The G2 configuration offers improved durability and smoother operation compared to standard M4 uppers, making it well-suited for high-round-count training and real-world operational use.

Factory-Assembled Quality Control

Unlike aftermarket upper builds, this conversion kit is assembled at the Colt factory under strict quality control standards. Every upper is properly headspaced, timed, and function-tested before leaving the facility. This level of quality assurance is especially important in short-barreled configurations, where gas system tuning and component fitment are critical for reliable performance. Users can install this upper with confidence knowing it meets Colt’s rigorous standards.

Ideal Applications

• Converting a standard lower receiver into an 11.5" SBR
• Law enforcement patrol and tactical team rifles
• Close-quarters battle and vehicle operations
• Suppressed shooting with SureFire SOCOM suppressors
• Professional security and contractor use
• High-reliability duty and training rifles

Why Choose the Colt LE6933-EPRII-SF3-CK Upper Conversion Kit?

• Factory-assembled 11.5" upper with SureFire SF3FH flash hider
• Enhanced Patrol Rifle G2 specifications for professional performance
• Quick-detach suppressor mounting with SureFire SOCOM compatibility
• Properly tuned gas system for short barrel reliability
• Proven Colt quality control and engineering
• Black finish for a professional, non-reflective appearance
• Compatible with Colt and mil-spec lower receivers

The Colt LE6933-EPRII-SF3-CK 5.56 NATO 11.5" Upper Receiver Conversion Kit with SureFire SF3FH Flash Hider (UPC 098289035684) is a high-quality, factory-assembled upper receiver that allows shooters to easily upgrade their existing lower receiver to a compact and suppressor-ready 11.5-inch platform. Featuring the SureFire SF3FH 3-prong flash hider and built to Enhanced Patrol Rifle G2 specifications, this conversion kit delivers the reliability, accuracy, and modern features that law enforcement and tactical professionals demand. Whether you’re a law enforcement officer looking to configure a duty SBR, a contractor needing a compact upper, or a serious shooter wanting a quality 11.5" upper with SureFire suppressor compatibility, the LE6933-EPRII-SF3-CK offers a complete, ready-to-install solution. Its combination of factory assembly, professional-grade components, and SureFire SF3FH technology makes this one of the most capable and dependable 11.5" upper receiver conversion kits available today.

Upgrade your AR-15 with the Colt Enhanced Patrol Rifle G2 11.5" Upper Receiver Conversion Kit.