sorry SOLD OUT. Special order requests only. Delay 3 weeks and price to be confirmed. this AR-15 / M4 Bench Block is a great tool thats specially designed to make it easier to assemble and disassemble your AR15 in a secure manner while installing a pin, detent, spring etc. It features a variety of notches, grooves and holes on both sides of the block and is ideally suited for the upper receiver, lower receiver, front sight and charging handle of an AR. Positions the upper receiver, lower receiver, front sight, and charging handle for maintenance or assembly. Durable non-marring urethane material to protect gun finish. Designed to assist in all aspects of an AR15 build. Ideal for changing or adjusting triggers. A must have tool for gunsmiths or home do it yourselfers.