This picatinny-style base is constructed of super-rigid aluminum alloy and fits factory drilled and tapped Mark II, Mark III, Mark IV, and 22/45 pistols.
Base Type: 1- Piece
Fits: Ruger MKII, MKIII, MK IV and 22/45
- Weight: 1.8 oz
- Length: 4.6"
- Rear sight removal is required for installation