BT-4 Combat. I bought this when I was a teenager. Used it until I moved away for University. It has been stored in a dry heated environment for nearly 10 years. All equipment has been well maintained, cleaned and oiled. Sale includes: BT-4 combat marker with hopper and stock barrel 3000psi compressed air cylinder (not co2) 16” sniper barrel JT blue safety mask Barrel squeegee, barrel condom, etc