{"id":75580,"date":"2017-06-27T11:07:23","date_gmt":"2017-06-27T15:07:23","guid":{"rendered":"https:\/\/www.gunsamerica.com\/blog\/?p=75580"},"modified":"2026-10-17T14:57:12","modified_gmt":"2026-10-17T19:57:12","slug":"automatic-mini-14-rugers-brings-team-ac-556-full-review","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/automatic-mini-14-rugers-brings-team-ac-556-full-review\/","title":{"rendered":"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The AC-556 is the select-fire version of the Ruger Mini-14, with semi-auto, three-round burst and full-auto settings, built from 1979 to 1999 for police, corrections and military buyers. The Mini-14 is the semi-auto rifle Ruger has sold to civilians since 1974 and still makes today. They look alike, but the AC-556 has a longer receiver and stock to fit its fire control, so you cannot simply convert one into the other. A transferable AC-556 is an NFA machine gun.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The A-Team ran on NBC from 1983 to 1987, and was a show that everyone watched. It was also the only time most of us ever even saw a <a href=\"https:\/\/gunsamerica.com\/ac556\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" target=\"_blank\" rel=\"noopener\">Ruger AC-556<\/a>, as Google and the consumer internet did not exist. This rifle was always at the ready and done in stainless steel with side-folding stocks. It was incredible! I always wanted to handle an AC-556, but the chance never came my way \u2026 until now 20, years after the A-Team went off the air.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-KAC-556F-3.jpg\" alt=\"The author had the opportunity to shoot a Ruger KAC-556 F on the range.\"\/><figcaption class=\"wp-element-caption\">The author had the opportunity to shoot a Ruger KAC-556 F on the range.<\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table of contents<\/h2><ul><li><a href=\"#h-what-is-the-difference-between-the-ac-556-and-the-mini-14\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">What Is the Difference Between the AC-556 and the Mini-14?<\/a><\/li><li><a href=\"#h-history-of-the-ac-556\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">History of the AC-556<\/a><\/li><li><a href=\"#h-acceptance\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">Acceptance<\/a><\/li><li><a href=\"#h-a-rare-opportunity\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">A Rare Opportunity<\/a><\/li><li><a href=\"#h-on-the-range\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">On the range<\/a><\/li><li><a href=\"#h-the-bottom-line\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">The Bottom Line<\/a><\/li><li><a href=\"#h-faq\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"2\">FAQ<\/a><ul><li><a href=\"#h-is-the-ruger-ac-556-legal-to-own\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"3\">Is the Ruger AC-556 legal to own?<\/a><\/li><li><a href=\"#h-can-you-convert-a-mini-14-into-an-ac-556\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"3\">Can you convert a Mini-14 into an AC-556?<\/a><\/li><li><a href=\"#h-what-does-kac-556-f-mean\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\" data-level=\"3\">What does KAC-556 F mean?<\/a><\/li><\/ul><\/li><\/ul><\/div>\n\n\n\n<h2 id=\"h-what-is-the-difference-between-the-ac-556-and-the-mini-14\" class=\"wp-block-heading\">What Is the Difference Between the AC-556 and the Mini-14?<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th>Ruger AC-556<\/th><th>Ruger Mini-14 (current Ranch)<\/th><\/tr><\/thead><tbody><tr><td>Fire modes<\/td><td>Semi, 3-round burst, full auto<\/td><td>Semi-auto only<\/td><\/tr><tr><td>Sold to<\/td><td>Military, police and corrections<\/td><td>Civilians and agencies<\/td><\/tr><tr><td>Years<\/td><td>1979 to 1999 (Ruger ended service in 2009)<\/td><td>Since 1974, still in production<\/td><\/tr><tr><td>Barrel<\/td><td>18.5 in or 13 in<\/td><td>18.5 in (Ranch), 16.1 in (Tactical)<\/td><\/tr><tr><td>Receiver and stock<\/td><td>Longer, to house the fire control<\/td><td>Standard Mini-14<\/td><\/tr><tr><td>Weight<\/td><td>Varies by model<\/td><td>6.4 lb (Ranch)<\/td><\/tr><tr><td>Legal status<\/td><td>NFA machine gun; only pre-1986 registered guns are transferable<\/td><td>Standard semi-auto rifle<\/td><\/tr><tr><td>Price<\/td><td>About $6,500 for one transferable example years ago, likely $10,000 or more now<\/td><td>Check current listings<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">From this article and our 2026 Mini-14 Ranch review.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Want the semi-auto version? Our <a href=\"https:\/\/gunsamerica.com\/digest\/ruger-mini-14-ranch-review\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\">2026 Ruger Mini-14 Ranch review<\/a> covers today&#8217;s rifle and its family tree, and our <a href=\"https:\/\/gunsamerica.com\/digest\/best-ruger-rifles\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\">best Ruger rifles<\/a> guide shows where it fits in the lineup.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/gunsamerica.com\/search?keyword=Ruger+Mini-14\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" target=\"_blank\" class=\"clickTracking\">&#x1f6d2; Check current Ruger Mini-14 listings on GunsAmerica<\/a><\/strong><\/p>\n\n\n\n<h2 id=\"h-history-of-the-ac-556\" class=\"wp-block-heading\">History of the AC-556<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The AC556 was based off the <a href=\"https:\/\/gunsamerica.com\/digest\/ruger-mini-14-ranch-review\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\">Mini-14<\/a>. Ruger, Sturm&amp; Co. began manufacturing the <a href=\"https:\/\/gunsamerica.com\/mini-14-magazines\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\">Mini-14<\/a> in 1974, borrowing many of its design elements from both the M1 and the M14. Bill Ruger was interested in law enforcement and military sales, and to that end he released the GB (government bayonet) model. The GB offered a plethora of unique options. It had a pistol grip, side folding stock, a 30-round magazine, bayonet lug, threaded barrel and a flash suppressor.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-KAC-556F-2-e1498574582113.jpg\" alt=\"The F in the KAC-556 F indicates that it has a folding stock and the K indicates that it is a stainless steel model.\"\/><figcaption class=\"wp-element-caption\">The F in the KAC-556 F indicates that it has a folding stock and the K indicates that it is a stainless steel model.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In 1979, Ruger introduced a selective-fire version of the Mini-14 called the AC-556. This gun was intended for military and law enforcement use only.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Spec-Box-AC-556.png\" alt=\"An Automatic Mini-14: Ruger brings the A-Team with its AC-556, Full Review\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-KAC-556F-7-400x267.jpg\" alt=\"The AC-556 allows users to select three modes of fire: semiautomatic, three-round bursts and automatic.\"\/><figcaption class=\"wp-element-caption\">The AC-556 allows users to select three modes of fire: semiautomatic, three-round bursts and automatic.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to the features of the GB, the AC-556 incorporated a selector on the right\/rear of the receiver to select either semiautomatic, three-round burst or automatic fire. The barrel is capped by a flash suppressor. \u00a0The manual safety remained in the front of the trigger guard. There were several models offered, and came equipped with either an 18\u00bd-inch or 13-inch barrel.<\/p>\n\n\n\n<h2 id=\"h-acceptance\" class=\"wp-block-heading\">Acceptance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Neither the AC-556 nor the Mini-14 GB ever saw major success in their intended markets. As a matter of fact, they frustrated the loyal owners of the Mini-14, with features like 30-round magazines, flash suppressors, bayonet lugs and folding stocks denied to most civilians by Ruger. The largest adoption of these guns was by the American corrections market, with prisons and jails putting them into service. There were some law enforcement agencies in Florida, Ohio and Oklahoma that gave the AC a whirl, but never to the level of the AR-15 platform. Internationally, the French used the rifle in select units, as did some South American elements. However, the gun never broke into the front lines of military service, as it failed the testing. The platform was simply not accurate and could not stand up to the high round counts expected of a main battle rifle.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-KAC-556F-8-400x267.jpg\" alt=\"There is not a direct conversion from the Mini-14 as the AC-556&#x27;s stock is longer to accommodate a larger fire control system.\"\/><figcaption class=\"wp-element-caption\">There is not a direct conversion from the Mini-14 as the AC-556&#8217;s stock is longer to accommodate a larger fire control system.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The AC-556 was doomed, as it had found no military success and the passage of the Firearm Owners Protection Act of 1986 and the Hughes Amendment forbade private ownership of new machineguns. To make matters worse, the government was allowing law enforcement to obtain used M16s for practically no cost. The AC-556\u2019s customer pool, already quite shallow, had dried up. Sadly, the AC-556 was dropped from production in 1999, and Ruger stopped offering service for the rifle in 2009.<\/p>\n\n\n\n<h2 id=\"h-a-rare-opportunity\" class=\"wp-block-heading\">A Rare Opportunity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">I had the chance to shoot and handle a vintage KAC-556 F, with the 18\u00bd-inch barreled machinegun. To decode the model for you, K stands for stainless-steel and F indicates that it had a folding stock. The rifle had been in public service its entire life and spent the last 20-plus years on a helicopter. This old rifle showed its age through a patchwork of scratches and dings on its stock and finish. Internally, things were in much better shape. There was only one 20-round blued magazine around when I got to fire it. As I looked the rifle over, I was impressed by the innovative the fire control system and folding stock especially for the late 1970s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Article Continues Below<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One reason that there aren\u2019t Mini-14 conversion kits is due to the fact that the receiver is longer in the AC-556 to accommodate the fire control system. The folding stock is also a rare find in the wild. I have seen these, with complete folder stock and gas systems going for almost $1,000. There are also some aftermarket offerings, which can be identified as not original by the location of the sling swivel. Most fakes will have the sling swivel mounted on the bottom of the gas block rather than the left side.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-KAC-556-F-5.jpg\" alt=\"The author found the KAC-556 F to be reliable but not very accurate.\"\/><figcaption class=\"wp-element-caption\">The author found the KAC-556 F to be reliable but not very accurate.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The three-round burst is accomplished through a mechanical counting system. There is a spur on the hammer that contacts a gear with six cogs. This gear is mounted to a pin that has a wheel on the other side with two notches. When the selector is moved to the three-round burst position, a finger pushes against the wheel as the trigger is depressed and the rifle fires, causing the assembly to rotate. As the finger contacts either of the two notches it disengages the sear. When automatic is selected, the finger is pushed down and away from the wheel, allowing the gun to cycle until the trigger is released.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-KAC-556F-6-400x267.jpg\" alt=\"The F in the KAC-556 F indicates that it has a folding stock.\"\/><figcaption class=\"wp-element-caption\">The F in the KAC-556 F indicates that it has a folding stock.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-on-the-range\" class=\"wp-block-heading\">On the range<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Getting the opportunity to shoot the KAC-556 F was like becoming a member of the A-Team. I was downright giddy. As I loaded up the 20-round metal magazine and rocked it into place in the magazine well, I was ready for an adventure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once the gun was loaded, I dropped the bolt to chamber a round and pushed the safety forward at the front of the trigger guard. I began by squeezing off one shot at a time to get a feel for the gun. Once I was comfortable, I selected the three-round burst and away we went. The only problem was that a few pulls of the trigger emptied the 20-round magazine quite quickly. I loaded the magazine and resumed dumping three-round burst. It seemed controllable, but the recoil impulse and climb were noticeably greater than an M16. My plan for the third magazine was a good, old-fashioned 20-round automatic magazine dump. Moving the selector to the A position, I grabbed hold tightly and depressed the trigger. The rifle was controllable \u2026 but just barely. This rifle is fun to shoot, but it does certainly make you appreciate buffers in a modern-day semiautomatic rifles. Of course, no trip to the range on an KAC-556 F would be complete without folding the stock and shooting it A-Team style. I shot some three-round burst and then the obligatory mag dump. Although the rifle did not get away from me, the only thing I was sure that I could hit was the berm. Unless in extremely close quarters, this is definitely just a Hollywood technique.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.gunsamerica.com\/blog\/wp-content\/uploads\/2017\/06\/Ruger-AC556-10-400x267.jpg\" alt=\"There some aftermarket options out there, but the original Ruger AC-556&#x27;s have the sling swivel on the left side of the gas block.\"\/><figcaption class=\"wp-element-caption\">There some aftermarket options out there, but the original Ruger AC-556&#8217;s have the sling swivel on the left side of the gas block.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-the-bottom-line\" class=\"wp-block-heading\">The Bottom Line<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There are some transferable AC-556\u2019s available; the last one I knew of went for about $6,500, and that was well over 12 years ago. I suspect that these run $10,000 plus. I understand why it lost out to the M16; the AC-556 is not a bad gun. Unlike the design process for most military arms, the civilian version was built first and then adapted to the military market. This is a shining example of why typically military to civilian adaptations produce the better firearms.<\/p>\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 id=\"h-is-the-ruger-ac-556-legal-to-own\" class=\"wp-block-heading\">Is the Ruger AC-556 legal to own?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Only as a transferable machine gun registered before the May 1986 cutoff, through the full NFA transfer process, and only where state and local law allows. This is a status summary, not legal advice.<\/p>\n\n\n\n<h3 id=\"h-can-you-convert-a-mini-14-into-an-ac-556\" class=\"wp-block-heading\">Can you convert a Mini-14 into an AC-556?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. There is no direct conversion: the AC-556 receiver and stock are longer to fit its fire control. Converting a semi-auto to fire automatically without registration is a federal crime.<\/p>\n\n\n\n<h3 id=\"h-what-does-kac-556-f-mean\" class=\"wp-block-heading\">What does KAC-556 F mean?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">K means stainless steel and F means folding stock. The rifle in this story was a stainless, folding-stock, 18.5 inch AC-556.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">More Mini-14 reading: <a href=\"https:\/\/gunsamerica.com\/digest\/mini-14-hack-samson-a-tm-folding-stock-and-hannibal-rail\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"automatic-mini-14-rugers-brings-team-ac-556-full-review\" title=\"Ruger AC-556 vs Mini-14: The Select-Fire Mini Explained\">our Mini-14 folding stock and rail upgrade story<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The AC-556 is the select-fire version of the Ruger Mini-14, with semi-auto, three-round burst and full-auto settings, built from 1979 to 1999 for police, corrections and military buyers. The Mini-14 is the semi-auto rifle Ruger has sold to civilians since 1974 and still makes today. They look alike, but the AC-556 has a longer receiver [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":75588,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"manual","footnotes":""},"categories":[694,324,858,37,1],"tags":[701,132,102,108,335,343,73],"featured":[],"hunt365":[],"class_list":["post-75580","post","type-post","status-publish","format-standard","has-post-thumbnail","category-gun-reviews","category-jon-hodoway","category-misc-rifles","category-gun-reviews-rifles","category-uncategorized","tag-5-56-nato","tag-buzz","tag-feature-articles","tag-guns","tag-military","tag-rifle","tag-ruger"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ruger AC-556 vs Mini-14: Differences, History and Legality<\/title>\n<meta name=\"description\" content=\"Ruger AC-556 vs Mini-14: the AC-556 is the select-fire Mini-14 built for police and military, the Mini-14 the semi-auto sold today. 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