{"id":1435,"date":"2026-01-24T12:47:17","date_gmt":"2026-01-24T12:47:17","guid":{"rendered":"https:\/\/polymer80firearms.com\/?post_type=product&p=1435"},"modified":"2026-01-24T12:47:32","modified_gmt":"2026-01-24T12:47:32","slug":"glock-19-compatible-premium-lower-parts-kit-smith-defense","status":"publish","type":"product","link":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/","title":{"rendered":"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense"},"content":{"rendered":"
\n

Introducing the Smith Defense (SD) G19 compatible Lower Parts Kit \u2013 a testament to the intersection of precision, quality, and craftsmanship that is synonymous with Smith Defense.<\/p>\n

The SD G19 Lower Parts Kit is meticulously designed for ALL G19 gen 1-3 compatible frames such as the\u00a0Polymer 80, GST-9, Strike80, Geisler Defense, PSA Dagger, and Bear Creek frames.\u00a0Trigger Pin and Locking Block Pin are included in this kit.<\/strong><\/em><\/strong>\u00a0<\/strong><\/em><\/strong><\/p>\n

Why Choose Smith Defense for Your G19 Glock Compatible Frame?<\/h2>\n

Each component in this kit has undergone our quality assurance process making this kit is the go-to choice for the modern firearm enthusiast. Every piece is a testament to detailed craftsmanship, ensuring you\u2019re equipped for peak performance right out of the box. They\u2019re tested, retested, and examined using industry-leading methods, guaranteeing a fit and function that surpasses industry standards. With this kit, you\u2019re not just getting parts; you\u2019re getting a commitment to precision.\u00a0<\/p>\n

Smith Defense is more than just a brand; it\u2019s a promise. We stand as a testament to\u00a0uncompromising quality and relentless dedication to the firearms community.\u00a0Rooted in Texas, Smith Defense encapsulates a blend of time-honored craftsmanship with state-of-the-art innovation.\u00a0With over a decade in the industry, we\u2019ve honed our craft, making sure every product lives up to our own high standards for quality and dependability.\u00a0Opt for the SD G19 Lower Parts Kit and feel the difference.<\/p>\n

What\u2019s in the Kit?<\/h2>\n
    \n
  • \n

    Trigger<\/strong>:\u00a0At the heart of all the frame parts is the SDS trigger with its unique hybrid geometry that is a cross between a curved and flat face that gently curves to a flat face. It still provides the shooter an index point to develop muscle memory, but also allows leeway in terms of finger placement.<\/p>\n<\/li>\n

  • \n

    Trigger Safety:\u00a0<\/strong>The all important trigger safety that prevents the gun from being unintentionally discharged is no longer an ergonomic afterthought. It has been widened 3X its standard width so it doesn\u2019t create a hotspot on the pad of the shooter\u2019s trigger finger even after hundreds of rounds.<\/p>\n<\/li>\n

  • \n

    Trigger Bar<\/strong>:\u00a0SDS has raised the bar with this trigger bar. Critical surfaces like the birds head that interacts with the connector and the sear surface at the back tip of the cruciform that engages the striker have all been precision ground and polished so there are no stamping marks, making for a smooth crisp trigger pull and break.\u00a0<\/p>\n<\/li>\n

  • \n

    Trigger Spring<\/strong>:\u00a0The slightly reduced-power trigger spring offers an improved reset feel and a more audible \u201cclick\u201d.<\/p>\n<\/li>\n

  • \n

    Connector<\/strong>:\u00a0Upgraded to 3.5 pounds, this connector is designed with all the correct angles for consistent and reliable reset every shot without any tinkering.<\/p>\n<\/li>\n

  • \n

    Trigger Housing and Ejector<\/strong>:\u00a0Designed for a flawless ejection every time.<\/p>\n<\/li>\n

  • \n

    Magazine Catch and Spring<\/strong>: The magazine catch\u2019s extended length remains unobtrusive thanks to its de-horned and melted edges. Its low profile shape is meant to blend perfectly with the GST-9\u2019s slim profile but will feel at home on any compatible frame.\u00a0<\/p>\n<\/li>\n

  • \n

    Slide Stop Lever and Spring:<\/strong>\u00a0Extended construction allows it to be easily used to stop and release the slide quickly and easily even under stress or duress.<\/p>\n<\/li>\n

  • \n

    Slide Lock Lever and Spring:<\/strong>\u00a0Slightly extended and tapered ends provide increased leverage during takedown\/fieldstrip without causing holster interference.\u00a0<\/p>\n<\/li>\n

  • \n

    Pin Set<\/strong>:\u00a0Turned to exacting outer diameter (OD) tolerances with a smooth finish and dimpled on the ends to accept a punch<\/p>\n<\/li>\n<\/ul>\n

    Trigger Housing Pin and Locking Block Pin are included in this kit.<\/strong> If you are looking to complete your GST-9, please use the\u00a0GST-9 Frame Completion Kit<\/p>\n

    All components proudly carry the Smith Defense name, reflecting our commitment to excellence, unparalleled performance, and durability of our products.<\/em><\/p>\n

    \u00a0<\/p>\n

    SHIPPING RESTRICTIONS<\/h2>\n

    Please note this item is restricted from shipping to Connecticut, New Jersey, New York, Washington D.C, Washington, Hawaii, Colorado, City of Philadelphia Pennsylvania, Illinois, and Rhode Island.<\/p>\n

    \u00a0<\/p>\n

    Glock\u00ae is a trademark of Glock Inc. Some components on our site are genuine Glock\u00ae OEM components, while others such as our 80% lowers are aftermarket and not produced by or endorsed by Glock Inc. All OEM and aftermarket parts are clearly marked.<\/em><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    Introducing the Smith Defense (SD) G19 compatible Lower Parts Kit \u2013 a testament to the intersection of precision, quality, and craftsmanship that is synonymous with Smith Defense. The SD G19 Lower Parts Kit is meticulously designed for ALL G19 gen 1-3 compatible frames such as the\u00a0Polymer 80, GST-9, Strike80, Geisler Defense, PSA Dagger, and Bear […]<\/p>\n","protected":false},"featured_media":1465,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":"","iawp_total_views":0},"product_brand":[23],"product_cat":[24],"product_tag":[],"class_list":{"0":"post-1435","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-polymer80","7":"product_cat-80-lower-pistol-parts","9":"first","10":"instock","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"yoast_head":"\nGlock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense - Polymer 80 Firearms - Authorized Polymer80 Distributor<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense\" \/>\n<meta property=\"og:description\" content=\"Introducing the Smith Defense (SD) G19 compatible Lower Parts Kit \u2013 a testament to the intersection of precision, quality, and craftsmanship that is synonymous with Smith Defense. The SD G19 Lower Parts Kit is meticulously designed for ALL G19 gen 1-3 compatible frames such as the\u00a0Polymer 80, GST-9, Strike80, Geisler Defense, PSA Dagger, and Bear […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/\" \/>\n<meta property=\"og:site_name\" content=\"Polymer 80 Firearms - Authorized Polymer80 Distributor\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-24T12:47:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/01\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"386\" \/>\n\t<meta property=\"og:image:height\" content=\"267\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/\",\"url\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/\",\"name\":\"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense - Polymer 80 Firearms - Authorized Polymer80 Distributor\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg\",\"datePublished\":\"2026-01-24T12:47:17+00:00\",\"dateModified\":\"2026-01-24T12:47:32+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/#primaryimage\",\"url\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg\",\"contentUrl\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg\",\"width\":386,\"height\":267},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/product\\\/glock-19-compatible-premium-lower-parts-kit-smith-defense\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/#website\",\"url\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/\",\"name\":\"Polymer 80 Firearms - Authorized Polymer80 Distributor\",\"description\":\"Precision Components. Trusted Process. Built for the Modern Enthusiast.\",\"publisher\":{\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/#organization\",\"name\":\"Polymer 80 Firearms - Authorized Polymer80 Distributor\",\"url\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/ChatGPT-Image-Feb-3-2026-11_37_43-AM.png\",\"contentUrl\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/wp-content\\\/uploads\\\/2026\\\/02\\\/ChatGPT-Image-Feb-3-2026-11_37_43-AM.png\",\"width\":1024,\"height\":1024,\"caption\":\"Polymer 80 Firearms - Authorized Polymer80 Distributor\"},\"image\":{\"@id\":\"https:\\\/\\\/usaguncenter.com\\\/polymer80\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense - Polymer 80 Firearms - Authorized Polymer80 Distributor","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/","og_locale":"en_US","og_type":"article","og_title":"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense","og_description":"Introducing the Smith Defense (SD) G19 compatible Lower Parts Kit \u2013 a testament to the intersection of precision, quality, and craftsmanship that is synonymous with Smith Defense. The SD G19 Lower Parts Kit is meticulously designed for ALL G19 gen 1-3 compatible frames such as the\u00a0Polymer 80, GST-9, Strike80, Geisler Defense, PSA Dagger, and Bear […]","og_url":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/","og_site_name":"Polymer 80 Firearms - Authorized Polymer80 Distributor","article_modified_time":"2026-01-24T12:47:32+00:00","og_image":[{"width":386,"height":267,"url":"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/01\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/","url":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/","name":"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense - Polymer 80 Firearms - Authorized Polymer80 Distributor","isPartOf":{"@id":"https:\/\/usaguncenter.com\/polymer80\/#website"},"primaryImageOfPage":{"@id":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/#primaryimage"},"image":{"@id":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/#primaryimage"},"thumbnailUrl":"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/01\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg","datePublished":"2026-01-24T12:47:17+00:00","dateModified":"2026-01-24T12:47:32+00:00","breadcrumb":{"@id":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/#primaryimage","url":"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/01\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg","contentUrl":"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/01\/glock-19-compatible-premium-lower-parts-kit-smith-defense.jpg","width":386,"height":267},{"@type":"BreadcrumbList","@id":"https:\/\/usaguncenter.com\/polymer80\/product\/glock-19-compatible-premium-lower-parts-kit-smith-defense\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/usaguncenter.com\/polymer80\/"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/usaguncenter.com\/polymer80\/shop\/"},{"@type":"ListItem","position":3,"name":"Glock 19 Compatible Premium Lower Parts Kit \u2013 Smith Defense"}]},{"@type":"WebSite","@id":"https:\/\/usaguncenter.com\/polymer80\/#website","url":"https:\/\/usaguncenter.com\/polymer80\/","name":"Polymer 80 Firearms - Authorized Polymer80 Distributor","description":"Precision Components. Trusted Process. Built for the Modern Enthusiast.","publisher":{"@id":"https:\/\/usaguncenter.com\/polymer80\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/usaguncenter.com\/polymer80\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/usaguncenter.com\/polymer80\/#organization","name":"Polymer 80 Firearms - Authorized Polymer80 Distributor","url":"https:\/\/usaguncenter.com\/polymer80\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/usaguncenter.com\/polymer80\/#\/schema\/logo\/image\/","url":"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/02\/ChatGPT-Image-Feb-3-2026-11_37_43-AM.png","contentUrl":"https:\/\/usaguncenter.com\/polymer80\/wp-content\/uploads\/2026\/02\/ChatGPT-Image-Feb-3-2026-11_37_43-AM.png","width":1024,"height":1024,"caption":"Polymer 80 Firearms - Authorized Polymer80 Distributor"},"image":{"@id":"https:\/\/usaguncenter.com\/polymer80\/#\/schema\/logo\/image\/"}}]}},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/product\/1435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/comments?post=1435"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/media\/1465"}],"wp:attachment":[{"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/media?parent=1435"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/product_brand?post=1435"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/product_cat?post=1435"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/usaguncenter.com\/polymer80\/wp-json\/wp\/v2\/product_tag?post=1435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}