Carlson's Choke Tube Lube is excellent for use on all choke tubes. Also works great on full-auto locking lugs, sears, bolts, and slide/rails. Smooth and clean operation in the severe cold (-100°F) and will hold up under extreme heat (+750°F) as well. This lube offers extreme pressure properties that are guaranteed to reduce friction and wear on weapons and choke tubes. This product will not attract dust, dirt, or powder fouling like most petroleum based products and does not contain Teflon or PTFE additives. Supplied in a 30 ml syringe.