The Kaw Valley Precision MACH 3-Lug Mount is a fully captured, enclosed system designed for use with the KVP MACH Linear Comp system. By utilizing 1-1/8"x28 TPI threads, the MACH 3-Lug Mount will fit many common silencer models such as the SilencerCo Octane and Omega K series, Rugged Obsidian and Griffin handgun silencers. The external components are machined from US 4140 Steel and Black Nitride QPQ finished to provide excellent wear properties for a long service life. The MACH system utilizes a 1-1/4" hexagonal wrench flats for easy installation with a standard open end or adjustable wrench. FeaturesAdded Length: .54"Outside Diameter: 1.285"Material: USA SteelCoating: QPQ Black NitrideWeight: 9MM - 2.8oz Notes:Keep internal o-rings lightly lubricated for better service life.Compare 9MM model to: Silencerco 3-Lug Mount AC2447