Blog Of The Month: AR180s.com

Nathaniel F
by Nathaniel F

For our February Blog Of The Month, we take a trip back to the early 1960s, after Armalite had sold the rights to its highly desirable AR-15 to Colt’s, and were searching for a competitor to their own design. The rifle designed by Art Miller to fill this void, itself an evolution of Stoner’s work on the 7.62mm AR-16, was the AR-18, the civilian model of which was called the AR-180. Dedicated to this fairly unsuccessful but highly influential weapon is AR180s.com, a website that in its own words seeks to become “the central depository for AR-180 information.”

AR180s.com's author's Costa Mesa AR-180, the rifle that started it all.

The site is only a couple of months old itself, but already contains some interesting information on the AR-180, including different manual variations, scope information, and a project to build a short-barreled AR-180 pistol, patterned off the AR-18S.

The AR-18, though it was a design that prioritized expeditiousness of manufacture uber alles, still was highly mechanically sound, and probably would have achieved greater success had it not been beaten to the market by other designs. Even so, it laid the mechanical foundation for later designs like the G36 and Remington ACR, and so has an important place in the history of modern small arms. AR180s.com promises much more information on this interesting and significant rifle, and is therefore our February Blog Of The Month!

Nathaniel F
Nathaniel F

Nathaniel is a history enthusiast and firearms hobbyist whose primary interest lies in military small arms technological developments beginning with the smokeless powder era. He can be reached via email at nathaniel.f@staff.thefirearmblog.com.

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  • You guys are a bunch of turds in a punch bowl. It is what it is. 18 didn't happen, although a noble effort. 15 is the state of the art, today. Get over it! If you have and like an 18... more power to you. I think you are doing what is correct for you. But, get over it, you are wasting to much energy making up something that is not reality. Have it, shoot it, enjoy it. move on to something that means something important. How about them PATRIOTS! ! ? Just as real as a rifle that didn't happen. Love you man, get a life. the world needs your mind to make it better.

    • See 2 previous
    • Schizuki Schizuki on Feb 09, 2015

      @William M Butler, MSG USA ret Yep... that's a Pats fan.

  • M M on Feb 08, 2015

    Something I kinda noticed:
    US adopted Krag-Jorgensen but Mauser refined the bolt action and the Mauser 98 action became a gold standard and proliferated around the world
    US adopted the 1911, then Browning/Saive refined the automatic handgun and the Hi-Power became a gold standard/proliferated around the world
    US adopted the AR-15 platform, Stoner/Miller refined the design and AR-18 derivatives became a gold standard and proliferated around the world (G-36, SA-80, SAR-21, ACR, FN2000, etc)

    • See 4 previous
    • Nathaniel F. Nathaniel F. on Feb 09, 2015

      @M That's not entirely true. Many weapons are also tappet operated, and a substantial number of DI designs are still being released (counting something like the CMMG MK 47 as "only" an AR and thus dismissing it as not a new design doesn't really convince me).

      It's interesting that people notice designs that recycle the 7-lug bolt and short-stroke piston of the AR-18, considering neither of those features are unique to the AR-18. Indeed, many short-stroke AR-15 derivatives have been developed in the past few years, but one could as easily attribute that to the success of the FAL, Vz. 58, or SKS as the AR-18. Designs like the ACR, MSBS, and S805 don't share much that's diagnostic with the AR-18, besides their gas system. In fact, all three of those designs incorporate gas regulators, so they're arguably more closely related to the FAL than the AR-18.

      Not to lambaste anyone, but I think some of the comments here are a good example of how when a new oprod design is introduced that isn't explicitly an AK derivative, folks tend to label it as an AR-18 derivative immediately.

      Examples: The AUG and SAR-21 were both mentioned as being AR-18 derivatives. You could maybe argue the AUG is a heavily mutated AR-18, but its bolt carrier/guide rod arrangement is still wildly different than that of the AR-18, and it utilizes a fairly large tappet piston with gas sealing rings and a return spring (so it's sort of a hybrid short-stroke/tappet). Clearly not a straight AR-18 derivative at all. I don't know why folks think the SAR-21 is related to the AR-18, it almost couldn't be more different (within the scope of rotary-bolt 5.56mm rifles, at least!). It has a two-lug rotary bolt with a fixed direct impingement operating rod; I'd say it owes more to the Garand than anything else.

      I should also mention that there is at least one short-stroke piston AR that is clearly not related to the AR-18: The POF P416. Its operating system is basically an FAL piston (complete with gas regulator) with a separate gas check/piston head and no return spring. So it's pretty weird!

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