Stoeger Air Pellet Power Rifle Gun ATAC S2 (.177 cal)Product Features Least noise of any airgun, with S2 Airflow Control (AFC) suppressor Enhanced accuracy and less vibration, from Gas Ram system Quick mounting of lasers, lights, bipods, and sling studs on built in Picatinny rails Adjustable length of pull, using removable buttstock spacer Easy attachment of rear sling . 177 cal Product Description The ATAC Suppressor S2 is piston driven perfection. Reach for the quietest airgun on the market, with its