Umarex Hammer .510/.50 PCP Air Rifle Precharged pneumatic (PCP) German made Barrel with .510 diameter grooves 2-round chamber magazine (includes 2) Rifled barrel Straight pull speed-bolt with 2 lbs cocking effort 3-lb trigger weight Regulated to 3,000 psi per shot 4,500 fill pressure (24 cubic inch carbon fiber tank) Built-in manometer (pressure gauge) Weaver/Picatinny optics rail PolyOne designed and manufactured stock AR Magpul style grip Integrated rear sling stud 3 slots in forearm grip to accept M-LOK attachments Quick Disconnect Foster fitting 43.75-inch overall length 8.5 pound overall weight unloaded without scope 29.5-inch barrel length with full-length composite shroud Made in the USA Umarex Hammer™ Energy Generation Grain Material FPS Energy (ft. lbs.) 200 Lead 1055 495 250 Lead 1000 555 275 Lead 945 545 300 Lead 930 576 330 Lead (Lyman) 935 641 350 Lead (Lyman) 875 595 550 Lead 760 700 Helpful resources: Tips for hunting with big bore airguns Tips for picking the right airgun for hunting game & pests Learn about hunting with air rifles Learn about air rifle hunting laws in your state Shop relatedcategories: pellet guns, pellet rifles Shop related categories: pellet guns, pellet rifles