Arca Rail Salmon River Solutions

Selling a brand new Salmon River Solutions Arca rail with picatinny tip. Never been mounted, i ordered the shorter version by mistake. 
here’s the description from their website: 

“The Hunters Rail is the perfect setup for the weight-conscious backcountry hunter, with 2″ of Picatinny rail, an integrated sling stud, and plenty of usable Arca rail on a tripod. It’s the best multi-use rail out there. The mounting side is slightly radiused to match the contour of any stock, and the ‘U’ cutout area is designed to wrap around the nose of your bottom metal. Each rail comes with 3 screws and tee nuts. Short rail overall length- 10.625″, 3oz Long rail overall length- 11.5″, 3.1oz”