- Fits Picatinny 1913 Scope Bases
- Made from heat-treated high strength steel
The Nightforce X-treme Duty 30mm Ring set is Designed to fit Mil. Std. 1913 scope bases, They machine a load-bearing recoil lug on the grade eight crossbolt. This lug precisely matches the machined cross lug of the Nightforce base, providing perfect alignment and superior accuracy. This is the highest quality rings available on the market.