Hatsan USA HGPILE45 Piledriver Air Rifle 45 Cal BlackThe PileDriver is optimized for high power hunting applications, it can produce over 900 FPE in the . 45 caliber model. With a long, 33 inch precision rifled barrel, this bullpup design keeps the max length under 4 feet. While getting up to 6 high powered shots at optimal velocity, there is also a max effective big game hunting range of up to 120 yards. With its single shot, extra large loading port, the Piledriver can accommodate ammo up to 34mm in