GM Hydra-Matic M16A1, Prop Marked Transferrable MG
M16 Full Auto, Not DIAS, Registered Receiver, .223
Used Condition
FFL is required
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7/30/2017 2:56 PM
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Item 671394462
Location Coral Springs, FL 33071
Shipping Buyer pays actual shipping costs for the following option(s): Overnight
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Payment USPS Money Order, Money Order, Certified Check
Checkout Yes
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Seller does not collect sales tax
Inspection/ Return Policy
AS IS - No refund or exchange

The seller of this item assumes all responsibility for this listing. You must contact the seller to resolve any questions or concerns before placing a bid. Payment must be made using U.S. dollars ($) unless otherwise stated in the listing. Firearms may only be shipped to a licensed dealer (FFL Holder). Some listed items may not be legal in every state. Complete your purchase within the law.

GM Hydra-Matic M16A1, US Gov't. Property Marked - Transferrable


Up for auction is my rare, US Gov’t. Property Marked, GM Corp. Hydra-Matic Division M16A1. It pains me to let this one go, but wedding plans are in the making and this is my sacrificial lamb.

Wanting to preserve this piece of history, and having other AR’s to play with, I couldn’t bring myself to fire this amazing piece of functional history. However, I will email to the winning bidder, the same video the previous owner emailed to me, proving this MG’s flawless function.

This is a fully transferrable machine gun, and one of only a very few GMC M16‘s to ever make it to the civilian market. THIS MG IS A REWAT, which is why it is coming to market for such a bargain price. If this gun were an an uncut original, it would easily fetch upwards of $40,000.

If you love GMC & Chevy, then this GMC Machine Gun is what you’ve been looking for. What better way is there to compliment your GMC or Chevy vehicle then with a GMC machine gun? The last 3 digits of the serial number have been blurred/blocked out, but this gun is in the 3,116,XXX serial number range, placing it in the late 1969-1970 production range.

As with all NFA firearms, this gun MUST transfer on a Form 4. If you live in Florida, it will transfer directly to you on a Form 4. If you live outside of Florida, it must first transfer on a Form 4 to your local Class III Dealer, and then from your dealer to you. NFA transfer times are currently right around 11 months. I included photos of the Form 4 to the person I purchased this gun from, and the Form 4 from my dealer to me.

According to the NFA paperwork, Hydra-Matic Div. GM Corp is the manufacturer of this NFA firearm. However, I reiterate THIS MG IS A REWAT.

If you are unfamiliar with the NFA process or have any questions at all, please ask any and all questions before placing a bid. Do not bid if you are not 100% certain you can legally own this MG where you live. Due to the NFA process, THIS GUN MUST BE PAID IN FULL BEFORE I SUBMIT THE FORM 4, AND IS BEING SOLD AS IS. I will cover the first $200 transfer fee (either to you if in state, or to your dealer if out of state).


For more on the history of GM’s Hydra-Matic Division production of the M16, below is an article I found at www DOT military DOT com with their write up on GM Hydra-Matic.

(The article below was sponsored by General Motors.)

When you think of General Motors you think of automobiles, not rifles. But the car maker's Hydra-Matic division played a big part in manufacturing the M-16 – the most widely used infantry weapon in the history of the U.S. military.

In 1948, after analyzing three war's worth of bullet hit data, the Army's Operations Research Office determined the service needed a rifle with low recoil that fired a small number of rounds. In 1957 the Army awarded contracts to Winchester and Armalite to design weapons that could penetrate both sides of a standard Army issue helmet at 500 meters with a magazine of 20 rounds that weighed around six pounds. The rifles also had to have both automatic and semi-automatic firing modes. Armalite's AR-15 won the competition, and the Pentagon rebranded it as the M-16.

In late 1959 Colt obtained manufacturing and marketing rights, and a few years later the company got the Pentagon's Advanced Research Project Agency to test 1,000 weapons as part of Project Agile – a DoD weapons initiative focused on potential fighting in southeast Asia, which was becoming more of a possibility at that point. The Army wasn't particularly impressed with the early version of the rifle, but the ever-controversial Defense Secretary Robert McNamara ignored their input and ordered 85,000 for the Army and 19,000 for the Air Force.

But the early versions of the rifle had significant reliability problems, mostly around the fact that they had a tendency to jam in the tough conditions that went with the battlefields of Vietnam. Word circulated across the rumor mill that many troops disliked the new weapon so much that they bypassed it in favor of the older and heavier M-14.

The bad press reached the Hill, and a congressional committee demanded answers. The lawmakers eventually forced the Army to do something about the situation – both real and perceived. The result was the U.S. Army Weapons Command's issuing of a new set of requirements beyond what the original M-16 design demanded. The new weapon – labeled "M16A1" – required a chrome-plated chamber to prevent rust, better powder, and an additional ten rounds in the magazine, bringing the total to 30.

Enter GM's Hydra-matic division, the organization that got the nod to answer DoD's emergent need.

The organization that would become Hydra-Matic Division was founded in May 1939 as Detroit Transmission Division.  It was created to continue the developmental work begun by Cadillac engineering and to manufacture the newly developed Hydra-Matic automatic transmission.  In 1953, following a fire at its plant in Livonia, Michigan, Detroit Transmission Division moved into a leased facility near the Willow Run Airport in Ypsilanti that once housed a WWII bomber plant.  It was at this facility in Ypsilanti that the M16A1 was manufactured.  In 1962, DTD officially changed its name to Hydra-Matic Division.  The division would later be combined with GM Engine Division to form GM Powertrain.

In view of what the government called an "urgent need" Hydra-matic management instituted a "crash" program. Part of this effort required GM's team to go to various government storage depots around the country to find the necessary machine tools in order to get the rifles out the door in a hurry without compromising on the military's requirements. Ultimately they obtained more than 1,000 machines that Hydra-matic housed in a 348,000 square foot facility.

GM shipped the 100, 000th rifle to the Army in September of 1969, two months ahead of the required schedule. A year later the company had delivered another 140,000 rifles. The company was awarded a second contract and eventually the tally hit 469,217 M16A1s provided to the Pentagon.

The M-16 underwent additional mods in the years that followed, including the development of a shorter barreled version that has been extensively used by special operators in the wars in Iraq and Afghanistan. But arguably, GM's model gave the weapon what it needed to become an icon of military hardware.

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