Upgrade your AR-15 with the Centurion 14″ C4 Midlength Front Sight Pocket Rail Handguard, the ultimate blend of lightweight design and unyielding rigidity for serious shooters. This patented two-piece free-float system clamps securely to your standard barrel nut, delivering a seamless continuous top Picatinny rail without the hassle of removing your front sight post or pinned muzzle devices. Perfect for midlength gas systems, it enhances accuracy, reduces weight, and provides ample mounting space for optics, lights, and grips—transforming your rifle into a precision tactical powerhouse.
Key Features
- Patented Two-Piece Design: Engineered for effortless installation on MIL-SPEC uppers, offering superior rigidity while maintaining a slim, ergonomic profile that feels natural in hand.
- Front Sight Pocket Compatibility: Accommodates midlength front sight bases (FSB) with a dedicated pocket, preserving your iron sights for reliable backup sighting.
- Full-Length Picatinny Rails: 1913-spec rails on all four sides for versatile accessory mounting, ensuring rock-solid attachment for your gear.
- Built-in QD Sling Points: Integrated sockets on both sides for quick, secure sling attachment with minimal rotation.
- Made in the USA: Crafted from premium 6061-T6 aluminum with Type III hard coat anodizing for enduring durability and corrosion resistance.
Technical Specifications
- Length: 14.25 inches
- Weight: 16.6 oz (with screws) + 1.1 oz (standard barrel nut)
- Material: 6061-T6 Aluminum
- Finish: Type III Hard Coat Anodized (Black)
- Rail System: Picatinny (1913)
- Profile: Free-Float
- Fasteners: Phosphate-finished Grade 8 bolts (included)
- Tools Required: 9/64″ and 3/32″ SAE hex keys (not included)
Why Choose the Centurion C4 Rail?
Tired of bulky drop-in handguards that compromise accuracy or force you to ditch your trusted front sight? The C4 Rail solves these pain points with its innovative clamp-on system, eliminating the need for barrel nut swaps or complex modifications. At just 16.6 oz, it shaves weight from your build without sacrificing strength, ideal for extended range sessions or dynamic field use. Users rave about its rock-solid lockup that minimizes flex, ensuring consistent shot placement even under heavy accessory loads. Whether you’re building a retro M4-style rifle or modernizing a classic, this handguard delivers professional-grade performance that stands up to the toughest conditions.
Elevate your AR-15’s potential today—add the Centurion 14″ C4 Midlength Front Sight Pocket Rail Handguard to your setup and experience the difference in precision, comfort, and versatility.
Frequently Asked Questions
Q1: Will this handguard fit billet upper receivers?
A: It is designed for MIL-SPEC uppers. Billet uppers may require modifications to accept the alignment tabs, but any alterations will void return eligibility.
Q2: Do I need to modify my front sight base?
A: Most midlength FSBs fit without issue, but some with extended sling swivel ears may need minor filing to prevent contact with the handguard.
Q3: Is professional installation recommended?
A: Yes, we strongly advise gunsmith installation to avoid damage. Centurion Arms cannot warranty items affected by improper setup.

