Aluminum forend for AR-15 - KNIGHTS ARMAMENT

The KAC URX 4 Rail is a fully modular design using the M-LOK accessory mounting system. The 4 URX train is stronger and more stable than previous URX models due to its one piece construction. It is also lighter thanks to its integral barrel nut (IBN) attachment system. The IBN system allows the rail itself to act as the nut when tightened onto the shotgun, completely eliminating the need for a separate steel barrel nut. M-LOK accessories can be mounted anywhere along the length of 4 URX, making it one of the most user configurable designs on the market. Each URX 4 rail comes with a mounting key, shim kit and instructions.