Wheeler Delta Series AR Platform Mag Well Vise Block - The Wheeler Delta Series AR Platform Mag Well Vise Block is quite possibly the handiest tool that exists for the AR platform. Designed for use with the Tipton Best Gun Vise, this center support slides into the magazine well and provides a steady base for cleaning or light gunsmithing on your AR platform rifle, in either breech or closed position. Users without a Best Gun Vise can mount the Delta Series Mag Well Vise Block directly to their bench top with the included fasteners. The innovative bolt service station locks bolt in for servicing extractor pin, and the center section rotates 180-degrees, in 7-degree increments, and locks into place at the desired location by using the magazine lock on your receiver. A built-in hammer stop prevents damage to lower receivers, and the solvent-resistant polymer construction provides durability and is non-marring to firearm surfaces. The mag well arm is removable for clamping in a bench vise when additional rigidity is required. Solvent-Resistant Polymer Provides Durability And Is Non-Marring To Surfaces Mount Directly To A Bench Top With The Included Fasteners Built-In Hammer Stop Prevents Damage To Lower Receiver Locks Into Place Using Magazine Lock On Firearm Receiver Mag Well Arm Is Removable For Clamping In A Vise