277 Fury in an AR 15?

Freezer

My nephew was trying to tell me the AR15 can e chambered for the 277 Fury with modification. I found this very hard to believe because this is generally speaking it has a case similar to a 308. In addition it is rated at 80,000 psi. with a velocity of 3000 fps. My research said it was developed for a belt fed machine gun Not the AR 15. Sig has developed their own bolt action rifle for this cartridge and states the REM 700 action may handle this cartridge but they don't recommend it and feel it may wear the action. With this stated. With all that said I couldn't see this cartridge being used in an AR 10 let alone an AR 15.

Has he learned something I can't find or don't know? Does the internet strike again?

Sig has made a cool bolt action rifle for this cartridge and at just over 6 lbs it is cool! But if this cartridges don't catch on and $1500 naaaa.

mitdr774

Given the length of the case, its not fitting in an AR-15 sized platform.

Spk

Ask him the source of his information. Tell him you want to read it. If it's a video, tell him you want to watch it.

Spk

I wonder if he may have been thinking about the 277 Wolverine.

Linefinder

I can't believe you guys are seriously discussing a 277 anything. Hypocrites.

Mike

Jayhawker

Maybe they should have called it the 6,8 Something

mitdr774

Hey now, I have a .270 WSM barrel somewhere around the house.  I never used it prior to the barrel being removed though.

Freezer

Where's Snake when you need him?

Justsomedude

AR-10 maybe?

Zee

Justsomedude said:

AR-10 maybe?

My thought as well. 

Freezer

We didn't say we owned a 270 or even shot a 270 at a squirrel and pissed him off. I was just trying to figure out what what some misguided person said about the 270. We have nothing to be ashamed of!

Freezer

Spk said:

I wonder if he may have been thinking about the 277 Wolverine.

No he was talking about the US military adopting it. He was trying to tell me with some modifications it would work in an M4. The new case design, proprietary power and primer dealt with the pressure questions. I just couldn't buy that and couldn't find anything to support his claim. Not being all that familiar with the AR platforms and MGs I brought the question here.

What I did see was this cartridge was for a belt fed machine gun but there was no mention which model/s it was designed for. The .50 caliber, 06 and .223 only generate about 55,000 psi. Is this cartridge for a  SAW or light MG? I doubt the current MG's actions would last long and barrel life would be significantly shortened. I wonder if the US has a new SAW/LMG in the works. 

It would be an interesting sporting or bench round if actions are strong enough to put up with the pressure and if it wouldn't eat the barrel. Sig's bolt action rifle that was built to handle this cartridge does look interesting and is very light. Proprietary powders, primers and cases would make it cost prohibitive. Because of these three factors I can't see this taking off in the civilian market even if the military adopts it. 

Heck this could have been the first 270 to be a good squirrel gun with proper shot placement. Problem being by the time you finish the break-in ritual the barrel will be ruined and you'll have to replace it with a 7-08. 

PFD

According to Wikipedia, it was developed by SIG for the army's " next generation squad weapon-rifle program".

My first time hearing of it.

breamfisher

It's a replacement for the M4.  Uses some similar or even the same furniture, same ergonomics, but it's a different rifle. 

https://modernfirearms.net/en/assault-rifles/u-s-a-assault-rifles/ngsw-r-sig-mcx-spear-2/

Spk

Kinda looks like an HK93 and a FN FAL had a mutant offspring.

It's kinda AR-ish towards the stock But it's not an M4.

Freezer

Ok this makes a lot more sense. There should actually be two new rifles  being developed, the SAW replacement and the M4 replacement. This is not an AR platform but an entirely new system. If I read into this correctly the new SAW will fill the roll of the current SAW using the same cartridge and mags as the squad weapon or a belt and serve as a light machinegun. 

I just couldn't believe an AR platform could be modified to handle pressures that would be questionable in a Rem 700 action.

As a side note Sig says they will be developing other cartridges and calibers with similar case technology. They believe it the wave of the future.