{"product_id":"stern-defense-9mm-luger-4-barrel-m-lok-mod-4-pistol-upper","title":"Stern Defense 9mm Luger 4\" Barrel M-LOK Mod 4 Pistol Upper","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eStern Defense 9mm Pistol Upper\u003c\/span\u003e\u003c\/strong\u003e is a complete upper receiver assembly built for compact AR-15 pistol platforms chambered in \u003cstrong\u003e9mm Luger\u003c\/strong\u003e. The assembly pairs a short \u003cstrong\u003e4\" steel barrel\u003c\/strong\u003e finished in \u003cstrong\u003eMelonite\u003c\/strong\u003e with a slim, matching \u003cstrong\u003e4\" Mod 4 M-LOK\u003c\/strong\u003e handguard, delivering a lightweight and maneuverable package for pistol-caliber AR builds.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe Mod 4 M-LOK handguard provides a clean, uncluttered look while accepting any M-LOK-compatible accessory - lights, lasers, vertical grips, or rail sections. The Melonite-treated steel barrel offers excellent wear and corrosion resistance for high-round-count 9mm use. As a complete upper, this assembly ships \u003cstrong\u003ewith the bolt included\u003c\/strong\u003e and is \u003cstrong\u003eready to drop onto a 9mm-compatible AR-15 pistol lower receiver\u003c\/strong\u003e (lower sold separately), making it an easy way to add or complete a 9mm AR pistol build.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThis Stern Defense pistol upper is a compact foundation for a 9mm AR pistol, offering a short overall footprint, modular M-LOK accessory support, and the reliability needed for range or defensive use.\u003c\/span\u003e\u003c\/p\u003e","brand":"Stern Defense","offers":[{"title":"Default Title","offer_id":55376217080130,"sku":"S76200","price":419.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/alt_eec5dee5-e260-43b5-9c31-3b78d9a03a95.jpg?v=1785237865","url":"https:\/\/centerfiresystems.com\/products\/stern-defense-9mm-luger-4-barrel-m-lok-mod-4-pistol-upper","provider":"Centerfire Systems","version":"1.0","type":"link"}