The gsg firefly features a wear-resistant alloy frame outfitted with an integrated accessory rail.The slide has an adjustable rear sight, and along with the rugged blowback system, fixed barrel and superior ergonomic grip, the gsg firefly delivers exceptional accuracy.Safeties include an internal locking device and slide-mounted ambidextrous safety.This model has a 4" threaded steel barrel and a black metal finish.Frame Finish: BlackType: PistolAction: Single/DoubleCaliber: 22 Long Rifle (LR)Barrel Length: 4.9"Capacity: 10+1Safety: AmbidextrousGrips: Black PolymerSight Configuration: Adjustable RearWeight: 24.6 ozFrame Material: Zinc AlloyBarrel Type: ThreadedSlide Description: Black Zinc AlloySight Style: AdjustableBarrel Length Range: 4.00" to 4.99"Weight Range: 16.00 oz to 31.99 oz