4421A Smith & Wesson Pistol Model 422 Barrel 4.5" .22 Long Rifle Used M&P 45 A.C.P Compatible Model: Model 16 (K-32

Compatible Model: Model 16 (K-32 Masterpiece)

Earlier Model 642 production may have used non-MIM (machined) components that are not interchangeable with MIM parts

If you need assistance identifying your model

Professional installation and timing required

Worn or improperly fitted bolts can cause accuracy problems

4421A Smith & Wesson Pistol Model 422 Barrel 4.5" .22 Long Rifle Used M&P 45 A.C.P Compatible Model: Model 16 (K-324421A Smith & Wesson Pistol Model 422 Barrel 4. 5" . 22 Long Rifle Used We sell used, new & new old stock Smith & Wesson revolver parts. Shoot us an email or give us a call for all your S&W part needs! USA Guns And Gear