{"product_id":"santan-stt-15-pillar-upper-receiver","title":"San Tan Tactical STT-15 Pillar Upper Receiver – Forged 7075-T6 AR-15 Platform","description":"\u003cp\u003eThe San Tan Tactical STT-15 Pillar Upper Receiver is a forged 7075-T6 aluminum upper designed for AR-15 pattern builds. This stripped upper receiver features San Tan's proprietary Pillar bedding system, which provides enhanced barrel-to-receiver contact for improved accuracy and consistency. Compatible with mil-spec AR-15 lower receivers and standard barrel nuts.\u003c\/p\u003e\u003cp\u003eForged from 7075-T6 aluminum with Type III hard coat anodizing for durability and corrosion resistance. The upper includes M4 feed ramps and is machined to mil-spec dimensions. Accepts standard charging handles, bolt carrier groups, and handguards. This is a stripped upper receiver—barrel, handguard, and other components sold separately. Assembly requires standard AR-15 armorer's tools and knowledge of proper headspacing procedures.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e Multi (5.56 NATO \/ .223 Wylde \/ .300 BLK compatible with appropriate barrel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Stripped Upper Receiver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Lower:\u003c\/strong\u003e Mil-spec AR-15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Forged 7075-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Type III Hard Coat Anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Upper Receiver Only (Stripped)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Requires barrel, bolt carrier group, charging handle, and handguard (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"San Tan Tactical","offers":[{"title":"Default Title","offer_id":47939818258687,"sku":"STTPILLAR1","price":210.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1338407.jpg?v=1766546889","url":"https:\/\/doublestackstore.com\/products\/santan-stt-15-pillar-upper-receiver","provider":"Double Stack Store","version":"1.0","type":"link"}