The tristar viper series is a semi-automatic gas operated shotgun that is reliable functional and hard working.Its removable choke system uses beretta/benelli mobil threads includes three choke tubes (ic m f) choke box and wrench.The viper also features manual e-z load mag cut-off vent ribbed barrel with matted sight plane & fiber optic front sight and chrome-plated chamber.A shot plug is included.This 20 gauge g2 model has a 28" barrel and black metal finish.Stock Description: Turkish WalnutAction: Semi-AutoGauge: 20 GaugeBarrel Length: 28"Capacity: 5+1Chamber: 3"Weight: 5.56 lbsChoke Configuration: MobilChokeReceiver Description: SteelChokes Included: F M ICBarrel Description: Vent Rib Chrome-LinedSights: Fiber Optic FrontSafety: CrossboltBarrel Length Range: 28" to 28.99"Weight Range: 5 lbs to 5.99 lbsHand: RightStock Finish Group: BrownMetal Finish Group: Blued/Black