Smith & Wesson K Frame Model 66-1 Bolt Spring & Plunger .357 Magnum Stainless Steel Old Style Used 6645 X-Frame and 500C (20 gauge) pump

and 500C (20 gauge) pump shotguns

Product Overview

We recommend installation by a qualified gunsmith to ensure proper headspace

your revolver may pre-date that era — contact us with your serial number and we'll help identify the correct part

Smith & Wesson K Frame Model 66-1 Bolt Spring & Plunger .357 Magnum Stainless Steel Old Style Used 6645 X-Frame and 500C (20 gauge) pumpK Frame Model 66 1 Bolt Spring & Plunger Factory OEM Part This genuine Smith & Wesson bolt spring and plunger assembly is designed specifically for K Frame Model 66 1 revolvers chambered in . 357 Magnum. Manufactured in stainless steel with the old style configuration, this used factory part ensures reliable cylinder lockup and timing. Key Features Frame: K Frame Model: 66 1 (old style) Caliber: . 357 Magnum (centerfire) Material: Stainless steel