{"id":4214,"date":"2026-07-26T22:32:07","date_gmt":"2026-07-26T22:32:07","guid":{"rendered":"https:\/\/landmarkfirearms.com\/ca\/?post_type=product&#038;p=4214"},"modified":"2026-07-26T22:32:20","modified_gmt":"2026-07-26T22:32:20","slug":"ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black","status":"publish","type":"product","link":"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/","title":{"rendered":"ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO 7.5&#8243; Barrel 30-Round Black"},"content":{"rendered":"<section id=\"overview\" class=\"product-information stack-l\">\n<div class=\"product-section-wrapper\">\n<div class=\"grid product-section-content\">\n<div class=\"product-section-overview\">\n<h1 style=\"text-align: center;\">Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO<\/h1>\n<p>Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. The American Tactical Inc. OMNI Maxx P4 Pistol features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. The Omni Hybrid lower features a patented hammer and trigger pin retainment system, preventing movement from the hammer and trigger pin during firing.<\/p>\n<p>The Omni Hybrid also features ATI&#8217;s patented over-molded metal inserts, which reinforce the buffer tube housing and rear takedown pin as well as reinforce the front take down pins. This allows for metal-on-metal contact with both the buffer tube as well as the rear takedown pin thus increasing strength and durability from recoil and consistent firing. The P4 also features a revolutionary Nano Composite Parts Kit. This kit includes the hammer, trigger, disconnector, takedown pins, safety selector, magazine release and detents all made from nano composite material that is just as strong as metal components but at only 1\/2 the weight. Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO<\/p>\n<p><b>Features:<\/b><\/p>\n<ul>\n<li>Patented Omni Hybrid Upper Receiver with Front and Rear Metal Inserts<\/li>\n<li>Patented Omni Hybrid Lower Receiver with Front and Rear Metal Inserts<\/li>\n<li>Nano Composite Parts Kit<\/li>\n<li>7.5&#8243; 1:7 Twist Nitride M4 5.56 x 45mm Barrel<\/li>\n<li>7&#8243; M-Lok Free Float Rail<\/li>\n<li>Low Profile Gas Block<\/li>\n<li>Standard AR Pistol Buffer Tube for use with most Braces<\/li>\n<li>30 Round Magazine<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"product-section-logos\"><a class=\"inline-block\" href=\"https:\/\/www.midwayusa.com\/ati\/b?bid=2782\" aria-label=\"Shop ATI products\"><img decoding=\"async\" class=\"product-section-logo\" src=\"https:\/\/media.mwstatic.com\/images\/vendorlogos\/2782.jpg?imwidth=150\" alt=\"ATI logo\" width=\"150\" height=\"150\" \/><\/a><\/div>\n<\/div>\n<p><span class=\"text-bold\">Made In\u00a0United States of America<\/span><\/p>\n<div class=\"prop-banner\"><img decoding=\"async\" class=\"inline-block margin-right-xs\" src=\"https:\/\/media.mwstatic.com\/external\/fonts\/fontawesome\/svg\/prop-65-warning-v1.svg\" alt=\"warning-icon\" width=\"16\" height=\"14\" aria-hidden=\"true\" \/><strong>WARNING:\u00a0<\/strong>Cancer and Reproductive Harm &#8211; www.P65Warnings.ca.gov.<\/div>\n<\/div>\n<\/section>\n<section id=\"specifications\" class=\"stack-l\">\n<h2 class=\"bg-blue-dark text-white stack-m inset-squish-m text-transform-none\">Specifications<\/h2>\n<div class=\"product-section-wrapper product-specifications\">\n<h3>Product Information<\/h3>\n<table class=\"product-specs-table padding-none stack-l width-100\">\n<tbody>\n<tr class=\"product-specs-table-container is-selectable\">\n<td class=\"product-specs-table-detail\">Cartridge<\/td>\n<td class=\"product-specs-table-definition\">5.56x45mm NATO<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Capacity<\/td>\n<td class=\"product-specs-table-definition\">30+1 Round<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Weight<\/td>\n<td class=\"product-specs-table-definition\">76 Ounce<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Barrel Length<\/td>\n<td class=\"product-specs-table-definition\">7.5 Inches<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Threads<\/td>\n<td class=\"product-specs-table-definition\">1\/2&#8243;-28<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Action Type<\/td>\n<td class=\"product-specs-table-definition\">Semi-Automatic<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Trigger Type<\/td>\n<td class=\"product-specs-table-definition\">Mil-Spec<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Safety<\/td>\n<td class=\"product-specs-table-definition\">Selector<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Threaded Muzzle<\/td>\n<td class=\"product-specs-table-definition\">Yes<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Barrel Finish<\/td>\n<td class=\"product-specs-table-definition\">Black<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Frame Material<\/td>\n<td class=\"product-specs-table-definition\">Polymer<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Grip Material<\/td>\n<td class=\"product-specs-table-definition\">Polymer<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Frame Finish<\/td>\n<td class=\"product-specs-table-definition\">Black<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Magazine Quantity<\/td>\n<td class=\"product-specs-table-definition\">1<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Grip Style<\/td>\n<td class=\"product-specs-table-definition\">Checkered<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Grip Color<\/td>\n<td class=\"product-specs-table-definition\">Black<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Compensated<\/td>\n<td class=\"product-specs-table-definition\">No<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container \">\n<td class=\"product-specs-table-detail\">Country of Origin<\/td>\n<td class=\"product-specs-table-definition\">United States of America<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"delivery\">Delivery Information<\/h3>\n<table class=\"product-specs-table padding-none stack-l width-100\">\n<tbody>\n<tr class=\"product-specs-table-container\">\n<td class=\"product-specs-table-detail\">Must Ship to FFL Dealer<button class=\"fas fa-question-circle tooltip-question-btn\" type=\"button\" aria-label=\"Open Tooltip about Must Ship to FFL Dealer\"><\/button><\/td>\n<td class=\"product-specs-table-definition\">Yes<\/td>\n<\/tr>\n<tr class=\"product-specs-table-container\">\n<td class=\"product-specs-table-detail\">Shipping Weight<button class=\"fas fa-question-circle tooltip-question-btn\" type=\"button\" aria-label=\"Open Tooltip about Shipping Weight\"><\/button><\/td>\n<td class=\"product-specs-table-definition\">6.350 Pounds<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. The American Tactical Inc. OMNI Maxx P4 Pistol features a fully-patented metal<\/p>\n","protected":false},"featured_media":4243,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[164,166],"product_tag":[],"class_list":["post-4214","product","type-product","status-publish","product_cat-firearms","product_cat-handguns","first","instock","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO | Canada<\/title>\n<meta name=\"description\" content=\"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. The American Tactical Inc. OMNI Maxx P4 Pistol features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. The Omni Hybrid lower features a patented hammer and trigger pin retainment system, preventing movement from the hammer and trigger pin during firing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO | Canada\" \/>\n<meta property=\"og:description\" content=\"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. The American Tactical Inc. OMNI Maxx P4 Pistol features a fully-patented metal reinforced polymer upper receiver along with a fully-patented metal reinforced polymer lower receiver. The Omni Hybrid lower features a patented hammer and trigger pin retainment system, preventing movement from the hammer and trigger pin during firing.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/\" \/>\n<meta property=\"og:site_name\" content=\"Canada\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-26T22:32:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-ATI-Omni-Max-P4-Semi-Automatic-Pistol-5.56x45mm-NATO.png\" \/>\n\t<meta property=\"og:image:width\" content=\"737\" \/>\n\t<meta property=\"og:image:height\" content=\"454\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\\\/\",\"url\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\\\/\",\"name\":\"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO | Canada\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/product\\\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/landmarkfirearms.com\\\/ca\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/07\\\/Buy-ATI-Omni-Max-P4-Semi-Automatic-Pistol-5.56x45mm-NATO.png\",\"datePublished\":\"2026-07-26T22:32:07+00:00\",\"dateModified\":\"2026-07-26T22:32:20+00:00\",\"description\":\"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. 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The Omni Hybrid lower features a patented hammer and trigger pin retainment system, preventing movement from the hammer and trigger pin during firing.","og_url":"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/","og_site_name":"Canada","article_modified_time":"2026-07-26T22:32:20+00:00","og_image":[{"width":737,"height":454,"url":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-ATI-Omni-Max-P4-Semi-Automatic-Pistol-5.56x45mm-NATO.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/","url":"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/","name":"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO | Canada","isPartOf":{"@id":"https:\/\/landmarkfirearms.com\/ca\/#website"},"primaryImageOfPage":{"@id":"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/#primaryimage"},"image":{"@id":"https:\/\/landmarkfirearms.com\/ca\/product\/ati-omni-max-p4-semi-automatic-pistol-5-56x45mm-nato-7-5-barrel-30-round-black\/#primaryimage"},"thumbnailUrl":"https:\/\/landmarkfirearms.com\/ca\/wp-content\/uploads\/sites\/2\/2026\/07\/Buy-ATI-Omni-Max-P4-Semi-Automatic-Pistol-5.56x45mm-NATO.png","datePublished":"2026-07-26T22:32:07+00:00","dateModified":"2026-07-26T22:32:20+00:00","description":"Buy ATI Omni Max P4 Semi-Automatic Pistol 5.56x45mm NATO. 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