1913 Picitanny rail higher than the pistol grip is engineered to supply near eye reduction for evening eyesight modules. Precision machined from ordnance quality metal and designed to interface in shut tolerance with the aluminum stock chassis. Conventional M14 and M1A steps are easily set up employing current M14 tools, https://sageebrstockforsale85184.blogzet.com/not-known-details-about-sage-ebr-chassis-for-sale-41184954