Area 1000 is a division of the well known and respected Systema. Area 1000 parts are just as durable and perform just as well as their high end counterpart, but only cost a fraction of the price. This piston high polished to create a smooth surface for uninterrupted airflow. This piston is ported for MK5 length barrels. The port allows the piston to accelerate before compressing the air so the BB gets off to a quick start and continues to accelerate all the way out of the barrel.