Brand: LWRC
Model: IC DI Direct Impingement
Platform: AR-15
Caliber: 5.56 NATO
Barrel Length: 16"
Gas Block Diameter: .750"
Gas Block Type: Low-Profile
Gas System: Direct Impingement
Barrel Extension: M4
Barrel Description: Heavy Spiral Fluted / Cold Hammer Forged
Twist Rate: 1:7
Muzzle Thread: 1/2 x 28
Muzzle Device: Flash Hider
Receiver Material: 7075-T6 Aluminum
Receiver Finish: OD Green
Handguard: Free Float Rail
Handguard Finish: OD Green
Attachment Style: M-LOK
Bolt Carrier Group: LWRCI Proprietary DI BCG
Charging Handle: Ambidextrous

Features

The LWRCI IC-DI upper receiver is a premium foundation for a custom AR build, engineered around a refined direct impingement operating system for reliable and consistent performance. It features a proprietary keyless bolt carrier design paired with an LWRCI bolt carrier group, enhancing durability and simplifying maintenance. The 16.1-inch barrel is cold hammer forged with button-cut rifling and distinctive spiral fluting, reducing weight while increasing surface area for improved heat dissipation during extended firing. Threaded 1/2x28 at the muzzle, it is ready to accept a wide range of muzzle devices and suppressors.

A free-float M-LOK handguard provides a lightweight, rigid platform for accessory mounting, while ambidextrous features—including the charging handle and sling mount—support versatile operation. The upper is equipped with an A2 birdcage flash hider and includes an H2 buffer with a carbine-length action spring to optimize cycling and recoil impulse. Built with LWRCI’s attention to precision and performance, this IC-DI upper delivers a durable, lightweight, and highly adaptable solution for modern AR platform builds.

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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.