The bright and ultra-durable hiviz litewave sight will enhance your confidence and shooting experience for the ruger mk i-iv pistol.It features an all steel frame and interchangeable litepipes.Factory height, fits and is compatible with models with factory rear sight.This model is compatible with ruger mark i,ii,iii,iv, single-six revolvers with adjustable rear sights and browning buck mark pistols with 0.750" bull barrel only.Does not fit ruger 22/45 lite model and buck mark 5.50" target, buck mark 5.50" field & challenge.Blade width: 0.125".Litepipe diameter: 0.090".Litepipe handgun version #6.Type: FrontFrame Material: SteelFrame Color: BlackFirearm Fit: Browning Buck MarkStyle: Fiber Optic Front SightFront Material: Fiber Optic LitePipeFront Color: Green Fiber OpticFirearm Type: Handgun