Our 12 Gram CO2 Cartridge T-Stock Lever Changer facilitates lightning fast propellant reloads without the cram and jam hassles and comes with an integral stock so you can shoulder your marker comfortably. Equipped with an adjustable vertical butt plate so you can dial in the angle you like to suit your own tastes. The T-Stock lever Changer is equipped with a Self -Adjusting piercer and is ASA adapter equipped only. The T-Stock lever Changer can be oriented either to the left or right via set screws. Made in the USA.