All the classic details of the time honored original are reproduced in today's semi-auto thompson 1927-a1.This.45 caliber carbine features a 16.5" finned barrel and genuine american walnut woodwork.It has a blade front sight with an open rear adjustable sight.This deluxe semi-auto model has a permanently affixed cutts compensator retaining the 16.5" overall barrel length.The frame and receiver are machined from solid steel with a blued metal finish, and a detachable buttstock, pistol grip and vertical foregrip.It includes one 20-round stick magazine.Metal Finish: BluedAction: Semi-AutoCaliber: 45 ACPBarrel Length: 16.50"Capacity: 20+1Safety: ManualOal: 29.50"- 39"Weight: 12.50 lbsStock Description: Removable FixedMuzzle: Compensator, FixedReceiver Material: SteelSights: Blade Front, Adjustable RearBarrel Description: FinnedBarrel Length Range: 16" to 16.99"Weight Range: 12 lbs to 12.99 lbsHand: RightStock Finish Group: BrownMetal Finish Group: Blued/Black