Smith & Wesson K L N Frame Rear Sight Blade .136" Black Factory New OEM - 040720000

Smith & Wesson K / L / N Frame Rear Sight Blade — .136" Height, Black, Factory New OEM

Part #040720000 | Factory New | K, L & N Frame | Adjustable Sight Models | Black | OEM

Genuine factory new Smith & Wesson rear sight blade, .136" height, black finish. Fits all K, L, and N Frame revolvers equipped with adjustable rear sights. Blade height determines point of impact: a taller blade raises the rear sight, shifting the point of impact downward. Selecting the correct blade height for your specific model and barrel length is critical for proper zero.

⚠️ Blade Height Selection

The .136" blade is the correct specification for the following models and barrel lengths per the S&W Rear Sight Blade Height Chart. Verify your model and barrel length before ordering:

• Model 18 — 4" barrel
• Model 28 — 4" and 6" barrel
• Model 53 — 4", 6", and 8 3/8" barrel

If your model and barrel length are not listed above, a different blade height is likely required. See the S&W Revolver Rear Sight Blade Height Chart to verify the correct height for your revolver before ordering.

Compatible Frames

Fits all K, L, and N Frame S&W revolvers with factory adjustable rear sights. Not compatible with fixed-sight (non-adjustable) models.

Specifications

• Part Number: 040720000
• Blade Height: .136"
• Finish: Black (standard black notch)
• Compatible Frames: K Frame, L Frame, N Frame
• Sight Type: Adjustable Rear Sight Blade
• Condition: Factory New
• OEM: Genuine Smith & Wesson factory part

Installation

Blade replacement may require fitting by a qualified gunsmith. Always verify zero after blade replacement.