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Large-Frame ARs: The Big Boys

Talyn

Talyn

SAINT
Founding Member

A closer look at the AR-10 and other large-frame AR rifles like it.​

The 21st century has seen a slow and relatively begrudged slog back to more powerful cartridges in larger and heavier weapons. There is significant military interest in adopting larger rifles and more powerful ammunition to increase effective range.

However, for the civilian market anything resembling a completely standard footprint for the large-frame rifles.

The author describes his approach on his large-frame AR (AR10-type) build.


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Talyn said:

A closer look at the AR-10 and other large-frame AR rifles like it.​

The 21st century has seen a slow and relatively begrudged slog back to more powerful cartridges in larger and heavier weapons. There is significant military interest in adopting larger rifles and more powerful ammunition to increase effective range.

However, for the civilian market anything resembling a completely standard footprint for the large-frame rifles.

The author describes his approach on his large-frame AR (AR10-type) build.


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😏military went from a lethal .30 to a light (55 grain), fast, barely stabilized bullet (1/14 twist rate) and very lethal lil rifle which they then decided lacked long range penetration against body armor (which the .30 had), so the solution was to use a heavier, slower and overstabilized (1/7 twist) little bullet, which while it will penetrate that helmet they worried about is in fact significantly less lethal than the earlier version. Because of its decreased lethality they are now going back to a larger bore much more powerful round. To make it even weirder, they are using a round that’s just a few hundred fps faster and the same diameter slug as the ancient .276 Pederson they looked at back 100 years ago😏. Makes ya wonder what would have happened had the .276 been adopted all those years ago in the Garand.. And the AR 10 evolved into the AR 15 which is now being replaced by a round more appropriate to the AR10🙄. How come those wonderful folks in military procurement can’t understand that the same basic Mk1 type 0 **** sapiens hasn’t changed in a lot of years. I like the 10 and the 14 and I believe a cartridge used for defense should be as lethal as possible, and NOT a varmint cartridge. Seems the more things change, the more they stay the same🙄
 
Pitdogg2 said:
I think it would be very advantageous that the .308 based AR's be standardized like the 5.56 platforms. It's kind of strange that they have not been. Maybe now that we have the new generation Sig platform they will be.
Seems to me it would be a plus plus for everyone in the business.
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It’s the main reason I don’t mess with them.
 
Talyn said:
One has to decide whether to go with the pattern "most commonly-used", or go proprietary.

Even in the AR-15 world there are deviations from the standard.
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Yeah but not many popular ones. Piston guns is the only one I can think of. And in the AR-15 world there is a “mil spec”.

Speaking of which I am itching to test out the VKTR Industries “mil spec” bolt carrier group with the “ corrected” cam pin path. Their rifle is a piston gun and the BCG for that one is proprietary, but they also make one for mil spec AR-15s. They’re never in stock. I’m considering driving over to their facility and maybe seeing if they’ll give me a tour. They’re located less than 10 miles from me.
 
The current Armalite pattern rifles are still the original spec.

There is some commonality between others, but the dimensions for the upper/lower receivers is where the crap hits the fan.

If you want to see real manufacturer to manufacturer variance, look at the high end companies
 
USMC6094 said:
The current Armalite pattern rifles are still the original spec.

There is some commonality between others, but the dimensions for the upper/lower receivers is where the crap hits the fan.

If you want to see real manufacturer to manufacturer variance, look at the high end companies
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Yes, however the DMPS-pattern is most commonly-used in the commercial market.

And while not specifically correct, the term AR-10-type is commonly used to identify a "large-frame" AR-type rifle.
 
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