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AA12 Sledgehammer Shotgun Available for Civilian Sale

As far as drool-worthy unobtainium goes, the mythical full-auto AA12 “Sledgehammer” shotgun ranks up there amongst the best of them.

We played with an AA12 at TriggrCon 2018.


Initially developed in the early 70s by Max Atchisson, the AA12 was designed as a full-auto-only open bolt 12-gauge shotgun.

Background of the AA-12 Shotgun

Continually tweaked for decades and pushed mostly in vain to military and law enforcement markets, the AA-12 was much more successful in scoring appearances in movies, TV shows, and video games.

With its stainless steel construction, gas-operated action, hefty recoil spring arrangement, and slow, roughly 360-rpm cyclic rate, the AA-12 was notable for minimal felt recoil and controllability in full-auto.

Atchisson sold the design in 1987 to Military Police Systems, which was responsible for all the subsequent product development. However, MPS saw limited commercial success and never fielded a semi-auto civilian variant of the AA12.


Fast forward to the present day, and Tactical Superiority and its new venture, Sol Invictus Arms, worked out a deal to finally make the AA12 available commercially.

Working closely with one of MPS's principals, they created a semi-automatic version, further refined the design, and set up modern production processes.


AA-12 Features

The civilian version sports a longer, NFA-friendly 18.5-inch barrel and fires from a closed bolt. The overall length is 38 inches and total weight is 10.5 pounds.

You can choose from versions with the iconic, original A-frame iron sights or the Picatinny rail on a riser that replaced them. 20-round drum and 8-round box magazines will be available.

Sol Invictus Arms plans for these guns to be limited editions of only 1,000 and is taking pre-orders on Armslist at $3,250.

AA12 Specs
Cartridge: 12 Gauge 2.75”
Action: Closed Bolt Semi-Auto
Barrel Length: 18.25”
OAL: 38”
Weight: 10.5lbs
Receiver: Stainless Steel
Magazine: 20 Round Drum or 8RD Box Mag

Here's a video from Larry Vickers demonstrating the full-auto AA12:

For more info on the AA12 click here.

Corey Graff contributed to this article.

23 responses to “AA12 Sledgehammer Shotgun Available for Civilian Sale”

  1. pat williams says:

    want to know cost

  2. Sophia Bing says:

    want to purchase

  3. D Johnstone says:

    Still want to see price!

  4. Chris D. Martin says:

    Is it ready for purchase? If so, how much?

  5. Robert John Beske says:

    I am interested in purchasing 3. Ho much are they and can i orderr?

  6. John Flood says:


  7. Duane Cramer says:

    They’re probably more than any of you asking the price can afford…..

  8. Segundo Morales says:

    I would like to order one AA12 shotgun.

  9. Glenn Peel says:

    I would like to order.

  10. michael hawkins says:

    how much does it cost for one.aa12 shotgun.

  11. Haixiao says:

    Would like to buy one, please contact me

  12. Mathias says:

    Would like info to purchase.

  13. Ken says:

    Would like to purchase so if you could please give info that would be perfect.
    Thank you!

  14. Joshua says:

    How much?

  15. Marvin Hawkins says:

    I am interested in purchasing one of your guns.

  16. Ted says:

    If all you people asking about the price would have read the entire article you might have noticed that the retail price was $3,250.00 and also that production was limited to 1000 units.

    Also, this article is from August 2018, or just over 2 1/2 years ago. So, I’m kind of thinking that that these are all sold out by now.

    Just saying.

    • Fred says:

      ….and you would be dead WRONG. Not a single AA-12 has been delivered. It is a proverbial shit show combining lawyers and the US Government (never a good combo).

  17. John Hallidsy says:

    I want to purchase an AA12 shotgun. How do I get on a list or a place I can buy one. I am retired LEO.

  18. Steve says:

    I would like to order

  19. Gerardo Peaney says:

    As of 12/21 these guns are NOT being made by Sol Invictus Arms because there are court proceedings with the original owners of the shotgun. The ATF is involve and until these issues are resolved the gun are NOT being made!

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