{"product_id":"sw-k-frame-model-10-barrel-4in-non-pinned-blue-38-special-1021c","title":"Smith \u0026 Wesson K Frame Model 10 Barrel 4\" Non-Pinned Blue Steel .38 Special - 1021C","description":"\u003ch2\u003eSmith \u0026amp; Wesson K Frame Model 10 Barrel – 4\", Non-Pinned, Blue Steel, .38 Special\u003c\/h2\u003e\u003cp\u003eThis factory original \u003cstrong\u003eSmith \u0026amp; Wesson K Frame Barrel\u003c\/strong\u003e is a 4-inch non-pinned blue steel barrel for the Model 10-10 revolver chambered in .38 Special. The non-pinned design is the later-production style, replacing the older pinned barrel configuration. Barrels are caliber-specific and frame-specific — this is a genuine OEM replacement for restoring your Model 10 to factory specification.\u003c\/p\u003e\u003ch3\u003ePart Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1021C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Smith \u0026amp; Wesson\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e K Frame (Medium Frame)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 10-10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e .38 Special\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Non-Pinned (later production)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Blue Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Used – Factory Original, Good Functional Condition\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eModel Compatibility\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003cth\u003eBarrel\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10-10\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003e4\" Non-Pinned\u003c\/td\u003e\n\u003ctd\u003e✓ Yes – Direct Fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 (other variants, non-pinned)\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003ctd\u003e✓ Verify – Confirm non-pinned configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 (pinned barrel models)\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003ctd\u003e✗ Not Compatible – Pinned vs non-pinned differ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e64 (stainless)\u003c\/td\u003e\n\u003ctd\u003e.38 Special\u003c\/td\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003ctd\u003e✗ Not Compatible – Different finish\/threading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel 13, 19, 65, 66 (.357 Mag)\u003c\/td\u003e\n\u003ctd\u003e.357 Magnum\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003e✗ Not Compatible – Caliber-specific barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJ, L, N Frame models\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003e✗ Not Compatible – Frame-specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003e⚠️ Barrels are \u003cstrong\u003ecaliber-specific and frame-specific\u003c\/strong\u003e. This is a \u003cstrong\u003enon-pinned\u003c\/strong\u003e barrel — not compatible with older pinned-barrel K Frame revolvers. Verify your exact model and production variant before ordering. Professional gunsmith installation with headspace verification is required.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003ePinned vs. Non-Pinned Barrels\u003c\/h3\u003e\u003cp\u003eEarly S\u0026amp;W K Frame revolvers used a barrel pin through the frame to secure the barrel. Later production (post-1982) switched to a non-pinned design with thread-only retention. These two styles are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e. Check your revolver's production date and barrel configuration before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation Note\u003c\/h3\u003e\u003cp\u003eBarrel replacement requires proper barrel tooling, timing verification, and headspace gauging. Professional gunsmith installation is required. Improper installation can result in dangerous cylinder gap issues or barrel misalignment.\u003c\/p\u003e","brand":"Smith \u0026 Wesson","offers":[{"title":"Default Title","offer_id":41238105423930,"sku":"1021C","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1423\/2020\/files\/DSCF0001_0ed82fba-c33f-411d-8c6f-16e652bc475d.jpg?v=1770736094","url":"https:\/\/usagunsandgear.com\/products\/sw-k-frame-model-10-barrel-4in-non-pinned-blue-38-special-1021c","provider":"USA Guns And Gear","version":"1.0","type":"link"}