{"id":7280,"date":"2026-04-26T14:27:14","date_gmt":"2026-04-26T14:27:14","guid":{"rendered":"https:\/\/flatsquare.in\/?post_type=download&#038;p=7280"},"modified":"2026-04-26T14:27:19","modified_gmt":"2026-04-26T14:27:19","slug":"hd-22lr-or-hd-22-which-is-a-popular-fully-printed-22lr-semi-automatic-rifle-design","status":"publish","type":"download","link":"https:\/\/flatsquare.in\/index.php\/downloads\/hd-22lr-or-hd-22-which-is-a-popular-fully-printed-22lr-semi-automatic-rifle-design\/","title":{"rendered":"HD-22LR\u00a0(or\u00a0HD-22), which is a popular &#8220;fully printed&#8221; .22LR semi-automatic rifle design"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li><strong>The Future is Printed:<\/strong>\u00a0100% printed frame, bolt, and receiver. Science fiction meets the firing range. \ud83d\ude80<\/li>\n\n\n\n<li><strong>Rimfire Revolution:<\/strong>\u00a0My new HD-22LR build is complete. No buffer tube, no problem. \ud83d\udee0\ufe0f<\/li>\n\n\n\n<li><strong>Precision in PLA+:<\/strong>\u00a0Putting the &#8220;Heavy Duty&#8221; in HD-22. Fully printed and ready for testing. \ud83c\udfaf<\/li>\n\n\n\n<li><strong>From Bed to Range:<\/strong>\u00a0Just pulled this HD-22LR off the printer. 3D2A at its finest. \ud83d\udda8\ufe0f\u2728<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<p>The&nbsp;<strong>HD-22LR<\/strong>&nbsp;is a lightweight, semi-automatic rifle designed for maximum 3D printability. Unlike traditional AR-style builds, this &#8220;Heavy Duty&#8221; (HD) model is engineered to be&nbsp;<strong>fully printed<\/strong>, including the bolt and receiver, significantly reducing the need for expensive metal parts kits.<\/p>\n\n\n\n<p><strong>Key Features:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bufferless Design:<\/strong>\u00a0Uses a blowback system that eliminates the need for a buffer tube, allowing for a more compact profile or folding brace.<\/li>\n\n\n\n<li><strong>High Printability:<\/strong>\u00a0Optimized for common materials like\u00a0<strong>PLA+<\/strong>\u00a0or\u00a0<strong>Carbon Fiber Nylon<\/strong>, it can be produced on standard desktop printers.<\/li>\n\n\n\n<li><strong>Modular Build:<\/strong>\u00a0Features integrated Picatinny rails for optics and accessories, making it a highly customizable rimfire platform.<\/li>\n\n\n\n<li><strong>Cost-Efficient:<\/strong>\u00a0By utilizing a printed bolt and simple hardware store components (like springs and pins), it offers a functional build at a fraction of the cost of retail firearms.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed4.jpg\" alt=\"\" class=\"wp-image-7281\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed4.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed4-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed4-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed4-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed4-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-9.jpg\" alt=\"\" class=\"wp-image-7282\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-9.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-9-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-9-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-9-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-9-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-8.jpg\" alt=\"\" class=\"wp-image-7283\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-8.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-8-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-8-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-8-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-8-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-7.jpg\" alt=\"\" class=\"wp-image-7285\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-7.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-7-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-7-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-7-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-7-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-6.jpg\" alt=\"\" class=\"wp-image-7286\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-6.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-6-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-6-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-6-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-6-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-3.jpg\" alt=\"\" class=\"wp-image-7287\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-3.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-3-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-3-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-3-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-3-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1682\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2-1682x1080.jpg\" alt=\"\" class=\"wp-image-7288\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2-1682x1080.jpg 1682w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2-300x193.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2-768x493.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2-1536x987.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2-32x21.jpg 32w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-2.jpg 2035w\" sizes=\"(max-width: 1682px) 100vw, 1682px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1058\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-1920x1058.jpg\" alt=\"\" class=\"wp-image-7289\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-1920x1058.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-300x165.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-768x423.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-1536x846.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-2048x1128.jpg 2048w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-1-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-11.jpg\" alt=\"\" class=\"wp-image-7290\" srcset=\"https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-11.jpg 1920w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-11-300x169.jpg 300w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-11-768x432.jpg 768w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-11-1536x864.jpg 1536w, https:\/\/flatsquare.in\/wp-content\/uploads\/2026\/04\/hd-22-fully-3d-printed-11-32x18.jpg 32w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The&nbsp;HD-22LR&nbsp;is a lightweight, semi-automatic rifle designed for maximum 3D printability. Unlike traditional AR-style builds, this &#8220;Heavy Duty&#8221; (HD) model is engineered to be&nbsp;fully printed, including the bolt and receiver, significantly reducing the need for expensive metal parts kits. Key Features:<\/p>\n","protected":false},"author":1,"featured_media":7291,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"edd_variable_prices":[],"_edd_bundled_products":[],"_edd_button_behavior":[],"footnotes":""},"edd-categories":[13,16],"edd-tags":[],"class_list":["post-7280","download","type-download","status-publish","has-post-thumbnail","hentry","download_category-3d-printable-files","download_category-tested-3d-print","edd-download","edd-download-cat-3d-printable-files","edd-download-cat-tested-3d-print"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HD-22LR\u00a0(or\u00a0HD-22), which is a popular &quot;fully printed&quot; .22LR semi-automatic rifle design -<\/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:\/\/flatsquare.in\/index.php\/downloads\/hd-22lr-or-hd-22-which-is-a-popular-fully-printed-22lr-semi-automatic-rifle-design\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HD-22LR\u00a0(or\u00a0HD-22), which is a popular &quot;fully printed&quot; .22LR semi-automatic rifle design -\" \/>\n<meta property=\"og:description\" content=\"The&nbsp;HD-22LR&nbsp;is a lightweight, semi-automatic rifle designed for maximum 3D printability. 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