The FX5500-U is built for shooters who demand performance, precision, and lightweight durability in one streamlined package. Featuring a 14.5 inches pencil Barrel with an Integral Slim 3-Port Muzzle Brake, this rifle meets the NFA 16 inches minimum barrel length requirement while optimizing recoil control and stability. The 13 inches Streamline Carbon Fiber Handguard enhances maneuverability without adding unnecessary bulk, while the Lightweight Bolt Carrier Group ensures smooth, reliable cycling with every shot. Designed to be super light, easy to handle, and ultra-rugged, the FX5500-U delivers exceptional strength without unnecessary weight, making it the perfect choice for those who refuse to compromise.

The 5.56 x 45mm pencil barrel with an integral 3-port brake meets the NFA's 16 inches minimum barrel length requirement
The Faxon enhanced forged upper receiver provides superior strength and reliability, offering a robust foundation for building high-performance firearms
The Faxon 13 inches carbon fiber M-LOK handguard combines lightweight construction with robust durability, offering easy attachment for accessories while reducing overall firearm weight
The Faxon gunner lightweight Bolt Carrier Group is designed for optimal weight savings while maintaining strength and reliability during high-pressure shooting conditions
Multi-position adjustable gas block, allowing for fine-tuning of gas flow to optimize performance and cycling for your firearm
The enhanced ambidextrous charging handle provides improved functionality, ensuring ease of use for both left and right handed users
The weight is 3.1 lb, providing a solid and sturdy product without sacrificing portability

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.