BluePrint Scope Mounts Made exclusively in the UK by Sportsmatch these double-screw mounts are available in low, medium and high format, with 25 or 30 mm rings and rust-proofed mounting screws 9.5 11.5mm (3/8) dovetails Commonly used on rimfire and airguns BluePrint mounts double screw fixings avoid the scope movement (creep) of inferior, cheaper mounts.