{"product_id":"hk-g3-hk33-mp5-5mm-x-28mm-steel-barrel-pin","title":"HK G3 \/ HK33 \/ MP5 5mm x 28mm Steel Barrel Pin","description":"\u003cp style=\"font-size: 14pt;\"\u003eHardened steel 5mm x 28mm barrel pin manufactured to standard dimensions for use in \u003cstrong\u003eHK G3, HK33, and MP5\u003c\/strong\u003e platforms. This pin is the correct 5 mm dowel specification and is used to retain the barrel to the trunnion\/receiver — a simple, reliable replacement part for repairs or builds.\u003c\/p\u003e\n\u003cul style=\"font-size: 14pt;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5mm x 28mm (diameter x length)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Hardened steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Natural \/ bright (uncoated) or heat-treated per batch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e HK G3, HK33, MP5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNOTE:\u003c\/strong\u003e These are aftermarket \/ non-OEM pins. Verify fitment with your specific rifle\/submachinegun variant before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 14pt;\"\u003eHardened steel construction provides the shear strength needed for barrel retention in roller-delayed and other common receiver designs. For firearm installations, we recommend professional fitment to confirm correct headspace and secure installation.\u003c\/p\u003e\n\u003cp style=\"font-size: 14pt; background-color: #ffff99;\"\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e (1) × Hardened steel 5mm x 28mm barrel pin. No other hardware included.\u003c\/p\u003e","brand":"Centerfire Systems","offers":[{"title":"Default Title","offer_id":52668830449986,"sku":"HK8977","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/IMG_0129__23474.1759245057.1280.1280.jpg?v=1774274506","url":"https:\/\/centerfiresystems.com\/products\/hk-g3-hk33-mp5-5mm-x-28mm-steel-barrel-pin","provider":"Centerfire Systems","version":"1.0","type":"link"}