Made in the USA, the MBUS Pro Offset Sights are part of an effective aiming system to supplement magnified optics on M1913 Picatinny mounting surfaces. In the event of a damaged or nonfunctional primary optic, or a close target, rotating the rifle 45 degrees provides the shooter with a fully-featured iron sighting solution. It features an all steel construction, case hardened and finished with Melonite QPQ, and windage adjustable with low-profile knob no tools required. *NOTE: Only compatible with MBUS Pro OFFSET Front sight.