The A5 Carstock Black by Killhouse Weapon Systems is a heavy-duty polymer carstock that is adjustable to six different positions with the push of a lever. This means you can have at an extended position, in short or somewhere in between! You will increase your accuracy by reducing the guns recoil and gain the ability to hold your marker tighter to your body for better stability while aiming! With a built in D-ring the stock is ready to attach a carry sling for easier transport.