Heckler & Koch G3K A4 7.62x51mm NATO Transferable Machine Gun


Status: In-Stock / Please Call to Purchase

This Chester County Armory listing is for a fabulous, like-new condition Heckler & Koch Model G3K A4 7.62x51mm NATO fully transferable NFA registered receiver machine gun.

This beautiful transferable G3K machine gun was created and tuned by famed H&K gunsmith Ralph Smith at RDTS Manufacturing, utilizing an HK 91 registered receiver conversion by New Frontier Armory. RDTS upgraded this model to modern specs through the addition of a paddle magazine release, four position fire controls, and correctly remarked to “G3K.” The barrel has been shortened to the G3K length and the firearm was completely refinished in RDTS’s H&K Exact Black finish.  This model features an original German telescoping stock. The H&K ambidextrous fire controls are pictogram marked and include positions for safe, semi-automatic, three round burst, and full-automatic.  This model has been test fired for function by RDTS and it runs flawlessly with standard 7.62mm SAAMI spec ammunition. This model has not been fired outside of gunsmith function testing by RDTS after the upgrades were completed. The weapon is tastefully marked with New Frontier’s information engraved in the slide well for the telescoping stock, while the RDTS G3K build information is labeled discretely on the rear tang under the grip housing.

This superb transferable machine gun is in outstanding mechanical and cosmetic condition. The full auto bolt carrier group notes no wear whatsoever.  The bore is bright and shiny, with crisp, clean rifling. The fire control internals are in beautiful, like-new condition as well.

Cosmetically, the RDTS professionally applied exterior finish is in new condition and notes no handling or storage marks, whatsoever. RDTS Manufacturing prides themselves on their H&K Exact Black finish being as close as one can get to H&K’s factory original finish, and their work on this transferable machine gun is no exception. The metalwork notes no dings, dents, scratches, gouges, malformations, etc. The polymer furniture is also in excellent condition with no handling or use marks of note. The four position trigger housing has been properly clipped and pinned to fit this weapon and is in factory new condition.

This spectacular NFA registered transferable machine gun is currently on an eForm-capable Form 3 for easy transfer.

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    This Chester County Armory listing is for a Heckler & Koch Model G3K A4 7.62x51mm NATO registered receiver transferable machine gun.  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


    Heckler & Koch / New Frontier Armory / RDTS Mfg.




    7.62x51mm NATO


    Roller-Delayed Blowback, Closed Bolt

    Barrel Length



    H&K Black