Type: Monolithic
Caliber: 223 Remington/5.56x45mm NATO
Barrel Type: M4 Contour, Free-Floating
Barrel Length: 16"
Barrel Material: Chrome Moly Vanadium Steel
Twist Rate: 1:7"
Muzzle Type: A2 Flash Hider
Receiver Type: A3 Flat-Top
Receiver Finish: Black Parkerized
Barrel Finish: Black Parkerized
Thread Size: 1/2-28
Gas System: Carbine Length
Includes: Monolithic Complete Upper Assembly, Complete M4 Full Auto Bolt Carrier Assembly, Charging Handle, Folding Front and Rear Sights, Manual

Features

The Colt Conversion Kit contains the complete upper receiver group, including a charging handle, bolt carrier group, and back up sight. Conversion Kits are available in both the standard upper receiver with handguard configuration and Monolithic 1-piece upper receiver with free-floating barrel configuration. All barrels feature a 1/7 right hand twist. Now you can convert any Colt rifle to the most state of the art configurations.

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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.