Installation by a qualified gunsmith is strongly recommended to ensure proper headspace and timing
The spring drives the cylinder stop upward into the cylinder notches
these factory parts deliver the fit and finish that only genuine Smith & Wesson parts can provide
Some fitting may be required to achieve optimal performance
Model 5903 (9mm Third Gen Full-Size)
Smith & Wesson K&L Frame Rear Adjustable Sight - Black 1.95" Old Style for 2.5" Barrels K161 SD40 Installation by a qualified gunsmithSmith & Wesson K&L Frame Rear Adjustable Sight Part Number: K161 Condition: Used Good Working Condition Finish: Black Style: 1. 95" Old Style Adjustable Rear Sight Barrel Length Compatibility: 2. 5" Barrels ONLY Compatible Models: Model 14 3, 14 4, 14 5 Model 15, 15 1 through 15 6 Model 16 3, 16 4 Model 17 3, 17 4, 17 5, 17 6 Model 18 3 Model 19 3, 19 4, 19 5, 19 6 Model 66, 66 1, 66 2, 66 3 Model 67, 67 1, 67 2 Model 586, 586 1, 586 2, 586 3 Model