R-Lock/Arca Dovetail Rail: Knights Armament URX3



This forend accessory rail attaches to the Knights Armament URX3 style forends.

Assembly is easy, just separate the forend assembly and use the included flat head cap screws and square nuts to attach the rail to the forend bottom, then reassemble the forend.  The square nuts sit inside the channel inside the forend half and are held from turning by the walls of the channel.

It is currently offered for the following configurations:

R394 KAC is 3.94" long, and covers the distance of 3 holes.  It can be used a tripod mounting plate.  Weighs 2.9 oz.

R591 KAC is 5.91" long, and fits the forends with 4 holes on the bottom.  Weighs 4.2oz.

R748 KAC is 7.48" long, and fits the forends with 5 holes on the bottom.  Weighs 5.5 oz.


These rails allow attaching accessories to the rifle, and the rifle to a tripod, with standard RRS/ ARCA Swiss 1.5" dovetail clamps.

Other Specifications:

Material: 6061T6 Aluminum

Finish: Type 3 Hardcoat Anodize

Color: Matte Black

Additional information

Weight .8 oz
Dimensions 14.25 × 1.5 × .3 in

R394 KAC, R591 KAC, R748 KAC


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