Authentic Smith & Wesson K-Frame Cylinder Stop - MPC11
Factory OEM part for Smith & Wesson Military & Police 1st Model revolvers. This cylinder stop (part number MPC11) is an essential timing component that ensures proper cylinder lockup and safe operation of your vintage K-frame revolver.
Compatibility & Fitment
Confirmed Compatible With:
- Smith & Wesson K-Frame Military & Police 1st Model (4-screw frame)
- .38 Colt caliber chambering
- Serial number range: Early production K-frames with 4-screw sideplate configuration
- Blue steel finish frames
Frame Type: K-Frame (medium frame)
Configuration: 4-screw sideplate (vintage configuration)
Caliber Compatibility: .38 Colt ctg.
Note: This is an old-style cylinder stop designed specifically for early M&P models. Verify your revolver's serial number and frame configuration before ordering. Not compatible with modern 2-screw or 3-screw K-frames.
Condition & Authenticity
Condition: Used, functional factory part
Origin: Removed from Serial #3312 M&P 1st Model
Manufacturer: Smith & Wesson (genuine OEM)
Finish: Original blue steel with age-appropriate wear
This is an authentic Smith & Wesson factory part, not an aftermarket reproduction. Shows normal wear consistent with age and use but remains fully functional for restoration or repair projects.
Why Choose This Part
- Factory OEM Quality: Genuine Smith & Wesson part, not a reproduction
- Correct Vintage Specification: Period-correct for 4-screw K-frame revolvers
- Proven Functionality: Removed from working firearm, tested timing component
- Restoration Grade: Ideal for period-correct restorations of vintage M&P revolvers
- Hard to Find: Early 4-screw parts are increasingly scarce
Ideal For
- Gunsmiths restoring vintage Smith & Wesson K-frame revolvers
- Collectors maintaining period-correct M&P 1st Model firearms
- Shooters repairing early .38 Colt K-frames
- Enthusiasts seeking authentic factory parts for 4-screw sideplate models
Solves These Common Issues
- Cylinder Timing Problems: Worn or damaged cylinder stops cause improper lockup
- Restoration Authenticity: Aftermarket parts compromise collector value
- Parts Scarcity: Early 4-screw components are difficult to source
- Safety Concerns: Faulty cylinder stops create dangerous timing issues
Technical Specifications
Part Number: MPC11
Function: Cylinder stop/bolt
Frame: K-Frame
Model: Military & Police 1st Model
Configuration: 4-screw sideplate
Material: Blue steel
Condition: Used/functional
Weight: 2 oz
Shipping: This is a small firearm part (not a regulated firearm component). Ships via USPS to all 50 states. No FFL required.
Installation requires gunsmithing knowledge and proper tools. If you're unsure about compatibility or installation, consult a qualified gunsmith. We specialize in authentic Smith & Wesson parts and can assist with fitment questions.