Sig Advanced Sport Pellet rifle is matched to original rifle model specs and engineered to Sig quality standards using authentic materials and, where necessary, patented performance innovations. The ASP20 is a suppressed single-shot, Advanced Sport Pellet (ASP) air rifle delivers down-range power and accuracy with the lightest cocking effort in its class, making it ideal for hunting small to medium game. This model has a black synthetic stock and is chambered for .177 pellet.