The classic american-style rimfire rifle, the 457 has a 24.8~~ barrel with no sights and is meant to be topped with a scope.Like all of cz's 457's, it has an 11mm dovetail milled into the top of its receiver for attaching scope ring/mounts.This suppressor ready model features 1/2x28 threads and a black synthetic stock.Metal Finish: BlackAction: BoltCaliber: 17 HMRBarrel Length: 20"Capacity: 5+1Trigger: AdjustableSafety: Two-PositionWeight: 6.17 lbsStock Description: Fixed American StyleTwist: 1:9"Barrel Description: Steel ThreadedMuzzle: ThreadedReceiver Material: SteelSights: None, Integral 11mm DovetailBarrel Length Range: 20" to 20.99"Weight Range: 6 lbs to 6.99 lbsHand: Right HandStock Finish Group: BlackMetal Finish Group: Blued/Black