{"product_id":"19120h-smith-wesson-k-model-19-4-hammer-block-357-magnum-used","title":"Smith \u0026 Wesson K Frame Model 19-4 Hammer Block .357 Magnum Used - 19120H","description":"\u003ch2\u003eOEM Hammer Block for S\u0026amp;W K Frame Model 19-4 Combat Magnum\u003c\/h2\u003e\u003cp\u003eKeep your Model 19-4 running safely with this authentic Smith \u0026amp; Wesson hammer block (firing pin block). This small but critical safety component sits between the hammer and frame, physically preventing the firing pin from moving forward unless the trigger is fully depressed — a key safeguard against accidental discharge from drops or impacts.\u003c\/p\u003e\u003ch3\u003ePart Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 19120H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e K Frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Model 19-4 Combat Magnum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .357 Magnum \/ .38 Special\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Firing pin block \/ drop safety\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used, inspected, functional\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThis part is designed for the Smith \u0026amp; Wesson K Frame Model 19-4. Professional gunsmith installation is recommended to ensure proper fit, timing, and function. Always verify compatibility with your specific serial number range before installation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eGenuine OEM S\u0026amp;W replacement part — not aftermarket.\u003c\/em\u003e\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41435083046970,"sku":"19120H","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSC03204.jpg?v=1779986722","url":"https:\/\/usagunsandgear.com\/products\/19120h-smith-wesson-k-model-19-4-hammer-block-357-magnum-used","provider":"USA Guns And Gear","version":"1.0","type":"link"}