{"product_id":"stern-defense-sd-bu45-45-acp-8620-steel-mag-phosphate-ar-15-m16-bolt","title":"Stern Defense SD-BU45 .45 ACP 8620 Steel Mag Phosphate AR-15\/M16 Bolt","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eStern Defense SD-BU45\u003c\/span\u003e\u003c\/strong\u003e is a dedicated \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e.45 ACP\u003c\/span\u003e\u003c\/strong\u003e bolt engineered for AR-15\/M16 platform builds chambered in pistol caliber. Machined from \u003cstrong\u003e8620 AISI steel\u003c\/strong\u003e and finished in \u003cstrong\u003eMag Phosphate\u003c\/strong\u003e for durability and corrosion resistance, this bolt is designed to drop into compatible uppers feeding from \u003cstrong\u003eGlock-pattern .45 ACP magazines\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe SD-BU45 is built to fit \u003cstrong\u003eMil-Spec and Glock-pattern upper receivers\u003c\/strong\u003e, making it a direct replacement or build component for AR-15 pistol caliber carbines and rifles running .45 ACP. Whether you are assembling a dedicated .45 ACP PCC upper or completing a caliber conversion on an existing AR-15 platform, this bolt delivers the locking and cycling interface needed for reliable function.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eAs part of Stern Defense's BU45 line, this bolt carries the same construction standards used across the company's AR-15 pistol-caliber offerings, pairing a robust steel body with the proven Mag Phosphate coating recognized throughout the firearms industry.\u003c\/span\u003e\u003c\/p\u003e","brand":"Stern Defense","offers":[{"title":"Default Title","offer_id":55472828285250,"sku":"174711","price":150.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_37e0dd4f-f182-43a5-81ed-319fadee634d.png?v=1785469998","url":"https:\/\/centerfiresystems.com\/products\/stern-defense-sd-bu45-45-acp-8620-steel-mag-phosphate-ar-15-m16-bolt","provider":"Centerfire Systems","version":"1.0","type":"link"}