Type: Pellet/BB Multi-pump Air Rifle. Manufacturer: Crosman. Model: MK-177. Materials: Plastic with some metal. Weight: 3.5 pounds. Barrel: 16.75 inches, rifled. Propulsion: Multi-pump. Action: Single shot - bolt action with manual advance magazine. Ammunition Type: .177 caliber pellets & 4.5mm steel BB's. Ammunition Capacity: 5 shot pellet magazine - 18 shot BB internal BB magazine - 350 round BB hopper. FPS: 750 with Pellets and 800 with BB's for the US version (Up to 495 with Canada version). The Crosman MK-177 Multi-Pump Pellet/BB Air Rifle is very much like it's brother the Crosman M4-177 with a few plusses and a few minuses when comparing the two of them together. On the plus side the MK-177 has a bit more power and also the pumping is much easier while yielding higher internal pressures. On the downside the Crosman MK-177 is almost entirely molded plastic with no removable lower magazine or adjustable stock, and the bolt has been switched around to what I feel is the wrong side since now you need to index the magazine on one side and work the bolt on the other requiring a less efficient approach. Either way it is nice to have another replica air rifle on the marker and for the relatively low price you get a nice accurate pellet rifle, great for target shooting and even small pest control. Read full article here: https://www.replicaairguns.com/2013/7/4/crosman-mk-177-pellet-bb-multi-pump-air-rifle-table-top-shoo.html Buy Airsoft Rifles in Canada: https://www.replicaairguns.ca/airsoft-rifles/ Buy Airsoft Rifles in the US: https://www.replicaairguns.us/airsoft-rifles/