The Badger Ordnance Remington Short Action M40A3/A5 Scope Rail was made specifically for USMC M40A3/A5 Scout Sniper Rifles. It features the USMC Clip Slot recoil lug pattern, 30 MOA bias, and a true MIL STD 1913 slot pattern for additional mounting options. It is machined from Ordnance Grade Steel and Mil Spec Manganese Phosphate finished.