It was bound to happen. We\u2019ve shown a number of AR-15-based builds over the years here at\u00a0Shooting Illustrated<\/em>, and it\u2019s long past time to add the larger-receiver AR-10 to the mix. Our Rifles editor offered a primer on what to look for in a\u00a02018 article<\/a>, and we\u2019ve decided to follow his excellent advice for our first AR-10 build.<\/p>\n From the rifle built it can easily be deduced that we opted for an LR-308 pattern large-frame AR. Both upper and lower receivers are from\u00a0Aero Precision<\/a>\u00a0\u2013 given the ambiguity in swapping back and forth with manufacturers as Adelmann details, we figured it would be prudent to obtain the upper and lower from the same manufacturer. We\u2019ve used and had excellent experiences with receivers from Aero Precision, so a matched set of the company\u2019s excellent M5 upper and lower receivers were ordered for this build.<\/p>\n <\/p>\n CMMG<\/a>\u00a0supplied both the lower parts kit \u2013 it is different from an AR-15 kit \u2013 and the buffer tube extension and buffer\/buffer spring. CMMG\u2019s lower parts kit for the LR-308 is packaged similarly to the AR-15, in that components for different parts are packaged together: hammer\/trigger springs with hammer and trigger, takedown pins with springs and detents, etc. The different bags are color-coded and a legend on the back explains which parts are which\u2014it\u2019s super handy, especially for someone relatively new to finishing a lower receiver.<\/p>\n One quick note of caution on the LR-308 lower receiver: While it looks to be identical in how things go together to the AR-15, there is one critical difference. The rear takedown pin is captured from the top of the receiver, not out the back like the AR-15. In the Aero lower receiver, you need to carefully thread the spring down into the hole and then finesse the detent in\u2014and keep it there\u2014until you can get the takedown pin in place. While this means the spring doesn\u2019t go flying into parts unknown if you miss, it does require fine motor skills and precision tools (very fine needlenose pliers are your friend here!)<\/p>\n Also, a quick callout for one new component involved in this build. We\u2019ve opted for the new\u00a0Mission First Tactical<\/a>\u00a0Battlelink Extreme Duty Minimalist stock for this build. Mission First\u2019s wildly popular Minimalist stock has become a favorite, both as an upgrade to existing rifles but also as an OEM part for many new rifles. Released in 2019, the Extreme Duty features QD sling mounts, a thicker rubber buttpad for comfort and more-rugged construction intended for use in heavier recoiling firearms like 12 gauge or, surprise, .308 Win. We\u2019re big fans of Mission First Tactical and have used its components in numerous builds, and expect the new Extreme Duty stock to handle well in testing.<\/p>\n To complete the upper receiver, we opted for a barrel and bolt-carrier group from\u00a0Faxon Firearms<\/a>. The super-lightweight AR-15 utilized a Faxon barrel and BCG, and has impressed us with accuracy and reliability, so it made for a simple choice. The company\u2019s offerings also happen to be quite reasonably priced, too.\u00a0Wilson Combat<\/a>\u00a0provided the M-Lok-laden handguard (and the exceptional trigger), while a\u00a0Radian<\/a>\u00a0Raptor ambidextrous charging handle gets the big rifle ready on the range.<\/p>\n With the variations in components more pronounced in the LR-308 than in the smaller-frame AR-15, magazine selection can sometimes be tricky. Theoretically, all LR\/SR-pattern magazines should work, but it\u2019s a good idea to test a variety of magazines. We will be testing\u00a0Magpul<\/a>,\u00a0Lancer<\/a>,\u00a0Brownells<\/a>\u00a0and\u00a0Hexmag<\/a>\u00a0LR-308-pattern magazines for function in this rifle, and while we expect them all to work, there may be certain variables like dropping free or holding the bolt open after the last round is fired to investigate.<\/p>\n As with our\u00a0224 Valkyrie build<\/a>, stay tuned for an update after testing. We\u2019ll check for accuracy, fit a proper scope to the carbine and report back on magazine function. While we don\u2019t expect any significant surprises, given the quality components used in the build, there\u2019s a gentleman named Murphy who sometimes like to interfere in the best-laid plans. We\u2019ve included some tips on how to thwart Mr. Murphy above, and we\u2019re hopeful no unpleasant surprises await us on the range.<\/p>\n","protected":false},"excerpt":{"rendered":" It’s not rocket science. The military lets 18 year old service members -with some supervision- do it. The hard part is figuring out what’s wrong when the things malfunction so you don’t waste your time, or parts. DIY: Building an AR-10-Style Rifle. It was bound to happen. We\u2019ve shown a number of AR-15-based builds over … Continue reading “”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-63500","post","type-post","status-publish","format-standard","hentry","category-gun-schtuff"],"_links":{"self":[{"href":"https:\/\/milesfortis.com\/index.php?rest_route=\/wp\/v2\/posts\/63500","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milesfortis.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milesfortis.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milesfortis.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milesfortis.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=63500"}],"version-history":[{"count":2,"href":"https:\/\/milesfortis.com\/index.php?rest_route=\/wp\/v2\/posts\/63500\/revisions"}],"predecessor-version":[{"id":63504,"href":"https:\/\/milesfortis.com\/index.php?rest_route=\/wp\/v2\/posts\/63500\/revisions\/63504"}],"wp:attachment":[{"href":"https:\/\/milesfortis.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=63500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milesfortis.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=63500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milesfortis.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=63500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"AeroPrecision,](\"https:\/\/d3apgz7jqdnp73.cloudfront.net\/media\/2110921\/aeroreceivers.jpg\")
<\/p>\n![\"AeroPrecision,](\"https:\/\/d3apgz7jqdnp73.cloudfront.net\/media\/2110924\/takedownpin.jpg\")
<\/p>\n![\"Mission](\"https:\/\/d3apgz7jqdnp73.cloudfront.net\/media\/2110923\/missionfirsttacticalstock.jpg\")
<\/p>\n![\"Wilson](\"https:\/\/d3apgz7jqdnp73.cloudfront.net\/media\/2110925\/wilsoncombathandguard.jpg\")
<\/p>\n