Picatinny Rail Quick Attachment Top to fit any of the Tri-X-Stand rifle rests. Posted byErnest G. Wilson April 24, 2018September 22, 2020 ewcalls.com » Products » Tri-X-Stands Shooting Systems » Picatinny Rail Quick Attachment Top to fit any of the Tri-X-Stand rifle rests. Recommended use is on a picatinny rail that is machined as one solid part of the AR15 forearm for reliable strength and safety. Price $120.00 Shipping. $14.00 Total $134.00 Quantity Product not in stock Price: $134.00 This product has sold out. Updating... Related