Real Avid AR10 Smart-Fit Vise Block Sleeve for SF AR15 Vise Block w/Pivot Lock Tool Adjustment Handle Knurled Texture Red. It is designed to slide over the existing Real Avid Smart-Fit AR15 Vise Block and eliminates any wiggle or movement while working on the firearm. The sleeve can be used with an inverted lower receiver to work on pistol grips or allow easy access to the underside of your AR. It is a must-have tool for securing an AR when swapping trigger groups servicing the lower receiver installing grips and buffer tubes or easily cleaning the barrel bore. Specifications for Real Avid AR10 Smart-Fit Vise Block Sleeve for SF AR15 Vise Block w/Pivot Lock Tool: Manufacturer: Real Avid Gun Model: AR-10 Gun Type: Rifle Color: Red Features of Real Avid Smart-Fit Vise Block Sleeve for AR10 Allows secure work on AR10s Slides over Smart-Fit AR15 Vise Block Not compatible with AR10B Package Contents: Real Avid AR10 Smart-Fit Vise Block Sleeve for SF AR15 Vise Block w/Pivot Lock Tool Pivot Lock Tool What firearm models does the manufacturer say Real Avid AR10 Smart-Fit Vise Block Sleeve for SF AR15 Vise Block w/Pivot Lock Tool is compatible with? The manufacturer says that Real Avid AR10 Smart-Fit Vise Block Sleeve for SF AR15 Vise Block w/Pivot Lock Tool is compatible with AR-10Real Avid AVAR10SFVBS: AR10 Smart-Fit Vise Block Sleeve for SF AR15 Vise Block w/Pivot Lock Tool Adjustment Handle Knurled Texture Red