OTIS Pro+ AR-15 Lock Block Upper Receiver Vise Block

The Otis Technology Pro+ AR-15 Lock Block is designed to make the removal and installation of barrels and hand guards quicker, and help tackle stuck barrel nuts.

Held in a standard bench vise, the lock block locks into the barrel extension, securing it from twisting and minimizing the chance of marring. Torque is applied to the barrel extension rather than the aluminum upper for a stronger hold.

To accommodate internal receiver differences, the AR-15 Lock Block includes a bronze bushing that allows the tool to work with slightly smaller internal specs. Designed for mil-spec receivers and compatible with most standard table/bench vises.

• Works with AR-15 upper receivers
• Engages locking lugs into the barrel extension to alleviate receiver tension
• Designed for mil-spec AR receivers
• Bronze bushing accommodates most ARs
• Compatible with most standard table or bench vises
• 1018 steel construction with manganese phosphate coating