Type: BB Rifle. Manufacturer: ASG. Model: TAC 4.5. Materials: Plastic with some internal metal parts. Weight: 3.5 pounds (1588 grams). Barrel: 12 inches, metal non-rifled. Propulsion: 12 gram CO2 x 1. Action: Semi auto, double action only. Ammunition Type: 4.5mm BB's. Ammunition Capacity: 21 round metal stick magazine. FPS: 417 It's nice when a new action shooting air rifle comes out on the market since there are not a ton of them. The ASG TAC 4.5 CO2 Air Rifle is a nice addition if you're looking for a BB shooter for plinking around the yard. You can also get an Airsoft firing version too called the ASG TAC 6 CO2 Airsoft Rifle if you want to shoot some rounds that are a little bit less destructive and more game friendly. The ASG TAC 4.5 CO2 Air Rifle offers a lot of customizability with its top and bottom rails for accessories which allow for the placement of the included removable iron sights and Bipod. I would recommend adding a red dot sight and perhaps even a tac light to really dec out this modern looking air rifle. Read full article here: https://www.replicaairguns.com/2018/3/24/asg-tac-45-co2-air-rifle-table-top-review