Benjamin Marauder PCP Air Rifle, Synthetic Stock 10-shot repeater with auto-indexing feature (.25 cal is an 8-shot repeater) Uses compressed air: 2,000 to 3,000 psi (make adjustments as shown in the owner's manual) Can be adjusted for different velocities Internal shroud makes this a VERY quiet gun Choked barrel delivers superior accuracy 2-stage adjustable match trigger...and the trigger is metal! Raised aluminum breech for easier loading of circular magazine 11mm dovetail on original/ Lothar Walther Barrels include a Weaver/Picatinny Rail Ambidextrous synthetic stock with vertically adjustable comb (almost a full pound lighter than the wood-stocked rifle!) Reversible bolt -- switch from right to left side (with our special service) Built-in air pressure gauge (manometer) 215cc air reservoir 7.30 lbs.* 42.8" long* Air reservoir ends with a male quick-disconnect Foster fitting for fast refills (requires a female Foster quick-disconnect adapter to fill from a scuba tank or hand pump) Includes one magazine and sling swivel studs Upgrades from the original version of the gun: Factory-installed depinger changes the sharp "ping" to a dull thud. Improved valve (increases the number of shots: .177/.22=32 shots, .25=16 shots). Trigger moved back for better hand position. Optional reversible bolt for left- or right-handed shooters. Simplified breech design for assembly, service and to provide a more stable platform for larger scopes. As the caliber increases, the gun becomes somewhat louder. PLEASE NOTE: Marauders that come with the Lothar Walther Barrels feature Weaver/Picatinny rails instead of the 11mm Dovetail of the original.