USR (Universal SOAR Rail) is the first in Really Right Stuff’s line of R-LOCK compatible mounting rails. This rail incorporates a 1.5″ dovetail, fully compatible with the new R-LOCK standard, while maintaining backward compatibility with RRS quick-release clamps and heads (SC-LR and ARMS-LR).
Precision-drilled 5.5mm safety-stops are milled into the rails along both edges of the rail for ambidextrous use. The R-LOCK holes, positioned at least 10mm apart, provide multiple safety-stop locations along the rail.
The R-LOCK hole positioning also accommodates centrally-located mounting features and traditional safety-stop mechanisms while maintaining backward compatibility. The geometry was optimized for manufacturing in 6061-T6 aluminum (though harder alloys may be used) and can be milled by any machinist or gunsmith without requiring a CNC mill.
We currently offer rails for (1) chassis systems and (2) M-LOK systems. The different anchors can slide within the rail slots and are held captive with an o-ring.
- 5.5mm stops
- Ambidextrous positioning
- 10mm min distance, hole-to-hole
- Smooth edges
- Optimized for 6061-T6 aluminum
- Backwards compatible
- RRS 1.5″ Standard
- Proudly made in the USA
- 240.0mm x 38.1mm x 8.0mm
- 9.45in x 1.50in x 0.32in
- Weight (without hardware): 4.1oz (116g)
- 340.0mm x 38.1mm x 8.0mm
- 13.39in x 1.50in x 0.32in
- Weight (without hardware): 5.8oz (164g)
What’s in the Box?
- (1) USR Rail
- (4) Universal SOAR Rail Single-point Anchor for Chassis
- (4) Flat Head Socket Cap Screw M4-0.7x8mm
- (4) Flat Head Socket Cap Screw 1/4″-20 X 3/4 in
- (4) Flat Head Socket Cap Screw #10-24 X 9/16 in
- (4) Flat Head Socket Cap Screw #10-32 X 3/4 in
- (1) 5/32″ Standard Hex Key
- (1) 1/8″ Hex Key
- (1) 2.5mm Hex Key
Note: The USR is a low-profile, lightweight system. The rail is not designed to be cantilevered out beyond the foregrip of a rifle. A minimum of one anchor per slot on the rail is required for adequate support, equally distributed. The rail needs to be installed on a flat surface and not all gunstocks are equally flat. Mounting to a surface that is not perfectly flat will result in a bow in the rail and lead to inconsistent performance of the clamp. Due to the universal fitment of this rail system, Really Right Stuff is not responsible for the bending or deformation of the rail due to improper installation or use.