The full-length rail measures 15.8″ in overall length and allows movement of RRS attachments or variants along the full length. The rail comes with the hardware needed to mount to the SS Rail found in every Foundation Stock.

All rails now come with RRS R-Lock compatibility.

Also compatible is the Arca Forward Weight system found here: https://foundationstocks.com/products/arca-forward-weights/

The Arca Forward Weight system allows an additional 8 oz or 16 oz to be added to the front rail for more weight and forward balance!