The Knight's Armament Corp. Upper Receiver Extending (URX) Rail system is one of the most trusted tactical free floating rails on the market, given that KAC invented the railed fore-end back in the early 90s.
Using a proprietary barrel nut, the URX 3.1 features a slick design which requires specialized tools for installation, but yields one of the lowest profile rail profiles available in a robust mounting solution.
Main part of the URX 3.1 rail is 12 3/8" long with an overhang of 7/8" in the front. Total length is 13 1/2". Ideal on a short-ish .308 barrel between 14.5 - 16" in length.
Rail features short picatinny rails front and rear with slick sides in the middle on left, right, and bottom. There are 4 anti-rotation QD sling swivel sockets, 2 front, 2 rear. The bottom rail is removable.
Includes: URX 3.1 Handguard, barrel nut and screws to attach bottom rail.
Requires: Knight's Armament SR25 URX barrel nut wrench and vice block to clamp and align URX with upper receiver.
Barrel nut and hardware are included.
|Shipping Restriction||ITAR/Export Restricted|
|Barrel Rest||Free Float|
|Finish||Type III Class 2 Hardcoat Anodized|