{"id":1353,"date":"2026-01-24T12:46:30","date_gmt":"2026-01-24T12:46:30","guid":{"rendered":"https:\/\/polymer80firearms.com\/?post_type=product&#038;p=1353"},"modified":"2026-01-24T12:46:48","modified_gmt":"2026-01-24T12:46:48","slug":"dpms-7-5%e2%80%b3-300aac-blackout-quad-rail-upper-ar-15-80-build-kit","status":"publish","type":"product","link":"https:\/\/usaguncenter.com\/polymer80\/product\/dpms-7-5%e2%80%b3-300aac-blackout-quad-rail-upper-ar-15-80-build-kit\/","title":{"rendered":"DPMS 7.5\u2033 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit"},"content":{"rendered":"<div class=\"wc-tab-inner wd-entry-content\">\n<p>This AR-15 80% build kit with billet 6061 80% lower contains all the necessary high-quality parts to build your AR-15 at home!\u00a0This package helps remove all the guess work out of building a quality AR15.<\/p>\n<p>Our Complete AR-15 80% Build Kit Features:<\/p>\n<ul>\n<li>DPMS 7.5\u2033 300AAC Blackout 6.5\u2033 Panther Quad Rail Upper<\/li>\n<li>80 Percent Arms Billet 6061 AR-15 80% Lower<\/li>\n<li>DPMS Black Nitride 5.56 Bolt Carrier Group<\/li>\n<li>DPMS Mil Spec AR-15 Charging Handle<\/li>\n<li>SB Tactical SBA5 Brace<\/li>\n<li>Smith Defense 3oz 6-Position Carbine Buffer Tube Kit<\/li>\n<li>Smith Defense AR-15 Lower Parts Kit<\/li>\n<\/ul>\n<h3>About the kit:<\/h3>\n<ul>\n<li>Barrel Length:\u00a07.5\u2033<\/li>\n<li>Barrel Profile:\u00a0Heavy<\/li>\n<li>Barrel Steel:\u00a0Chrome Moly Vanadium<\/li>\n<li>Barrel Finish:\u00a0Phosphate<\/li>\n<li>Chrome Lining:\u00a0No<\/li>\n<li>Muzzle Thread Pattern:\u00a05\/8\u2033 x 24<\/li>\n<li>Twist Rate:\u00a01 in 8\u2033<\/li>\n<li>Barrel Extension:\u00a0M4<\/li>\n<li>Gas System Length:\u00a0Carbine<\/li>\n<li>Diameter at Gas Block:\u00a0.750\u2033<\/li>\n<li>Gas Block Type:\u00a0Low-Profile Gas Block<\/li>\n<li>Muzzle Device:\u00a0A2 -style<\/li>\n<li>Receiver Material:\u00a0Forged 7075-T6<\/li>\n<li>Receiver Type:\u00a0M4<\/li>\n<li>Handguard Type:\u00a0DPMS 6.5\u2033 Quad Rail<\/li>\n<li>Bolt Material:\u00a0Carpenter 158 Steel<\/li>\n<li>Bolt Carrier Profile:\u00a0Full Auto<\/li>\n<li>BCG &amp; Charging Handle Included<\/li>\n<\/ul>\n<p>Barrel: 7.5\u2033 barrel length\u00a04150V Chrome Moly Vanadium Steel. Chambered in 300 Blackout, with a 1\/8 twist, and a pistol-length gas system. The barrel is finished off with a low profile gas block, a custom 6.5\u2033 quad rail handguard, and an A2 flash hider.<\/p>\n<p>Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp cuts, these upper upper receivers are made for us right here in the USA.<\/p>\n<p>Bolt Carrier Group: For AR15 and M16 rifles and carbines. Bolt is made of shot-peened, Mil-spec Carpenter 158\u00ae steel. Gas key is secured with grade 8 fasteners and staked. Includes Charging Handle.<\/p>\n<p>Each upper is assembled to order with care, and test fired by DPMS. If there are any issues please contact DPMS as units are received sealed and sent out to customers sealed from DPMS.<\/p>\n<p>Bolt carrier group and charging handle included.<\/p>\n<p><strong>Shipping Restrictions: This item is restricted from shipping to\u00a0California, Colorado, Connecticut, Delaware, Hawaii, Illinois,\u00a0Maine,\u00a0Maryland,\u00a0Massachusetts, Nevada, New Jersey, New York, Oregon, Rhode Island, Vermont, Washington, Washington D.C., Philadelphia, York City, Reading Pennsylvania, Delaware County Pennsylvania<\/strong><\/p>\n<p><strong>Under California law, this product is or contains an unserialized \u201cfirearm precursor part\u201d and cannot be sold into the State of California. 80% Arms cannot accept any orders of this product for shipment to the State of California, or to any customer who is a resident of the State of California.<\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>This AR-15 80% build kit with billet 6061 80% lower contains all the necessary high-quality parts to build your AR-15 at home!\u00a0This package helps remove all the guess work out of building a quality AR15. Our Complete AR-15 80% Build Kit Features: DPMS 7.5\u2033 300AAC Blackout 6.5\u2033 Panther Quad Rail Upper 80 Percent Arms Billet [&hellip;]<\/p>\n","protected":false},"featured_media":1383,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":"","iawp_total_views":0},"product_brand":[23],"product_cat":[33],"product_tag":[],"class_list":{"0":"post-1353","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-polymer80","7":"product_cat-ar-15-build-kits","9":"first","10":"instock","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>DPMS 7.5\u2033 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit - 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\/dpms-7-5\u2033-300aac-blackout-quad-rail-upper-ar-15-80-build-kit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DPMS 7.5\u2033 300AAC Blackout Quad-Rail Upper AR-15 80% Build Kit\" \/>\n<meta property=\"og:description\" content=\"This AR-15 80% build kit with billet 6061 80% lower contains all the necessary high-quality parts to build your AR-15 at home!\u00a0This package helps remove all the guess work out of building a quality AR15. 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