Presma AR-15 Lower Polymer Vise Block Black. Specifications for Presma AR-15 Lower Vise Block: Manufacturer: Presma Gun Model: AR-15 Gun Type: Rifle Fabric/Material: Polymer Color: Black Condition: New Projectile Caliber: .223 Caliber Quantity: 1 Features of Presma AR-15 Lower Vise Block Allows safe mounting of the lower receiver into a vise Perfect for cleaning service or weapon assembly Fits into magazine housing from either the top or bottom Magazine catch securely locks the receiver to the block Will not distort or damage the receiver Solvent resistant polymer construction Package Contents: Presma AR-15 Lower Vise Block What firearm models does the manufacturer say Presma AR-15 Lower Vise Block is compatible with? The manufacturer says that Presma AR-15 Lower Vise Block is compatible with AR-15Presma LVB: AR-15 Lower Polymer Vise Block Black