Badger Ordnance's DMR 30mm Scope Rings were specifically designed for the USMC Designated Marksman Rifle and are optimized for use on the M14/M1A platform. They will work on any rifle with a MIL-STD 1913 Picatinny scope rail - an enough clearance for the scope's objective bell. Badger Ordnance DMR 30mm Scope Rings are machined from steel barstock as serialized, matched pairs, so they are truly as close to identical as technologically possible - unlike mass-produced rings. The benefit of matched rings is far lower risk of damage to your scope caused by misaligned rings. Sold in matched pairs Robust hex-head clamping nuts Torx-head ring cap screws Mfg: Badger Ordnance