Sylvan Arms AR15 Support Module Lower Vise Block Black. This support module slides easily and fits firmly into its corresponding Sylvan Arms cleaning plate thereby safeguarding against finish and structural damage that may be brought on by the application of vise pressure such as scratches dents twists and other structural distortions. Specifications for Sylvan Arms AR15 Support Module Lower Vise Block: Manufacturer: Sylvan Arms Gun Model: AR-15 Caliber: .223 Remington Fabric/Material: Polycarbonate Color: Black Features of Sylvan Arms AR15 Support Module Lower Vise Block Lets you secure your firearm into the support cleaning plate for whatever gunsmithing work you need to do. This lower support module can handle your lower receivers it slides into the magazine well and stays firmly in place. This lower support module is durable and highly resistant to chemicals including gun solvents and cleaners. Package Contents: Sylvan Arms AR15 Support Module Lower Vise Block What firearm models does the manufacturer say Sylvan Arms AR15 Support Module Lower Vise Block is compatible with? The manufacturer says that Sylvan Arms AR15 Support Module Lower Vise Block is compatible with AR-15Sylvan Arms VSB101: AR15 Support Module Lower Vise Block Black