The KAC Upper Receiver Extending (URX) 4 rail is a fully modular free floating, hybrid replacement forend for your AR-15 rifle. The rail features a continuous upper picatinny rail and is compatible with Keymod accessory attachment. This handguard is more stable with it's unique one-piece construction and integral barrel nut making it one of the most light weight configurable systems currently available. Knights handguards are made from high quality aluminum and feature a long lasting tough, and durable anodized black finish. When you need professional grade parts, equipment or gear and second best just isn't good enough, turn to Knight Armament.

Features and Specifications:
Manufacturer Number:31207
One-piece aluminum construction
Anodized, black finish
10.75" length
10.2 ounces
1.55" Inside diameter
1.68" outside diamter (side-to-side)
Keymod accessory attachements
Free Float Design

Includes:
Each URX 4 Rail comes complete with an installation wrench, shim kit and instructions.