This is a very powerful rifle , and shoots great. Will take a deer no problem. The barrel is 30" long. Will make 400 + FPE. Comes with the fill probe , and one 6 round mag. Also comes with 164 .495 round lead balls that weigh 183 grains.Will shoot slugs like 235 grain NSA hollow point. Shooter 1721 made a you tube video , and shot a beer can at 150 yards. Holds air perfectly. Lowered price to 450.