Carlson's Choke Tube Lube and 15ml Gun Lube Syringe is excellent for use on all choke tubes. It also works great on full-auto locking lugs, sears, bolts, and slide/rails. It allows for smooth and clean operation in the severe cold -100 degrees F and will hold up under extreme heat +750 degrees 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 15 ml syringe. syringe container makes for easy application does not contain Teflon or PTE additives excellent for use on all choke tubes works great on sears, bolts, and slide rails