AIM Sports Inc AR Lower Receiver Vise Block Black Medium. This vise block manufactured by the experts at AIM Sports Inc allows for safe mounting of the lower receiver and fits into magazine housing from either the top or bottom. Specifications for AIM Sports Inc AR Lower Receiver Vise Block: Manufacturer: AIM Sports Inc Gun Make: AR Platform Gun Type: Rifle Color: Black Condition: New Length: 4.9 in Features of AIM Sports Inc AR Lower Receiver 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: AIM Sports Inc AR Lower Receiver Vise Block AIM Sports Inc ATLVB: AR Lower Receiver Vise Block Black Medium