Smith & Wesson K Frame Steel 4" Barrel Blank New Old Stock NOS - K5BL

Smith & Wesson K Frame Steel 4" Barrel Blank — New Old Stock (NOS)

Part Lot # K5BL | New Old Stock (NOS) | K Frame | 4" | Steel | No Bore

⚠️ This is a barrel blank — it does NOT have a bore. This is an undrilled, unthreaded factory steel barrel blank intended for custom gunsmithing work. It requires professional machining (boring, threading, crowning, and front sight installation) before use. This is not a drop-in replacement barrel.

Genuine Smith & Wesson factory steel K Frame barrel blank, 4" length, New Old Stock (NOS) condition — unused from original S&W production inventory. Authentic NOS K Frame barrel blanks are extremely scarce; S&W no longer produces barrel blanks for the K Frame line. This is a premium piece for pistolsmiths, custom revolver builders, or serious collectors looking to source rare factory K Frame components.

Specifications

• Frame: K Frame
• Length: 4"
• Material: Steel
• Bore: None — undrilled barrel blank
• Finish: In-the-white / unfinished (standard for barrel blanks)
• Condition: New Old Stock (NOS) — unused, good condition
• OEM: Genuine Smith & Wesson factory part

Compatibility

K Frame barrel blanks are compatible with K Frame revolver platforms including Models 10, 13, 14, 15, 16, 17, 18, 19, 64, 65, 66, 67 and related variants — subject to gunsmith fitting, threading, and machining. Caliber is determined by bore diameter machined by the gunsmith.

Important Note

This listing is for the barrel blank only. Professional pistolsmith machining is required before installation. Contact us with any questions about this blank.