Sturm Ruger AC556 .223REM 18″bbl Factory 4-Position Select Fire Transferable Machine Gun w/ Ruger Folding Stock


Status:In-Stock / Please Call to Purchase

This Chester County Armory listing is for a Sturm Ruger AC556  .223REM transferable factory machine. This is an 18″ barrel model and will come with both its original AC556 fixed rifle stock, as well as an iconic Ruger folding stock and its original factory manual.

One of the few factory-made 4-position (safe, semi-auto, three round burst, and full-auto) machine guns made in the US, the Sturm Ruger AC-556 is still one of the more desired full-auto weapons available at a relatively reasonable NFA price tag left on the US transferable market. Designed and built like all of Ruger’s weapons (robust, with exceptional functionality), Bill Ruger’s entry into Class 3 weapons with the AC-556 was no different.  Designed in 1979 and based off the semi-auto Mini-14 that he (along with Jim Sullivan) created 6 years earlier as a scaled down version of the venerable M14 rifle, Ruger developed a workhouse of a gun, utilizing new manufacturing and engineering techniques to build a robust weapon that would be affordable to produce without sacrificing durability in any way. This occurred namely with the creation of a strong, investment cast receiver that was heat treated to withstand even the harshest of punishment.

This factory-made and registered machine gun is in very good overall condition. The internal mechanics and the interior metalwork are very good, with no dings, dents, cracks,  malformations, etc.. The internals on this weapon note some finish wear on the metal-to-metal contact points of the bolt and charging handle assembly. The bolt face is clean and crisp. The barrel remains clean, bright, and shiny, with excellent rifling. The installed Ruger Mini-14 folding stock has been professionally fitted and shimmed to eliminate play and increase reliability and accuracy. The stock can be easily removed and replaced with the fixed stock, but care should be taken to reinsert the installed shims for maximum accuracy and reliability. This model has been test fired and runs flawlessly with standard SAAMI ammunition.

Cosmetically, the bluing of the receiver displays minor surface scratches and handling marks.  The rear sight platform does note some degradation of the paint at spots, mostly on the right side of the sight. Both wooden stocks display some minor indentations and light surface marks , but no chips, cracks, etc.. The folding stock lock-up remains tight and solid. Purchase of this model will include both the folding stock, as well as its factory original Ruger AC-556 fixed stock. Purchase will also include one 30rd factory magazine, as well as a factory original manual.

This factory transferable AC556 machine gun is currently on a Form 3 for easy eForm transfer. The current NFA paperwork lists “Sturm Ruger” as the manufacturer of this weapon and “AC556” as the model.

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    This Chester County Armory listing is for a factory Sturm Ruger AC-556 .223rem transferable machine gun. This a factory rifle model that features an original 18″ bbl.  This model is currently in-stock, in our possession,  and available for purchase on a Form 3. Please call us at 610-235-6155 to purchase or for additional information on this item


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