5.7x28 AR-15?

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SimpleIsGood229

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Have y'all seen the 5.7 AR? I think it's a neat idea using the FN 50 round mags and ejecting out the bottom, but what purpose does it serve? What does it do that a conventional 5.56 AR doesn't?

One would think that maybe it would serve the same role as the P(S)90 (short-barreled PDW), but the barrel can't even be that short because of the positioning of the magazine. Am I just missing something here?
 
Other than allowing you to shoot 5.7 it doesn't do anything special. Sounds like another way to spend your hard earned money to me.
 
It's cool, and you can legally own an auto version (with a registered lower).
It needs no more reason for existence.
 
I've got a buddy who's a big fan of 5.7x28 and is thinking of getting one of those uppers to go with his other 5.7mm guns. I imagine he's the kind of guy they're aiming that product at -- people who've already picked up an FN57 and/or PS90 and who already have reason to have 5.7x28 ammo laying around.
 
gives you a better trigger than you can possibly have on a PS90
better stock
better grip
 
I have heard that Blackwater was getting the first 500 or so of these but as for their description of "COMING SOON" I spoke to someone at the site listed and was told it would be a few weeks before they are available for purchase.

That was in the area of 6 months ago, SO dont hold your breath.


http://www.militarygunsupply.com/shop2/index.php?main_page=product_info&cPath=35&products_id=338

flattop57a.jpg

AR-57 Upper Receiver coming soon!
$695.00
Available soon, the new AR-57 Upper Receiver. This highly anticipated upper is a direct replacement for your standard AR upper that will allow you to shoot the FNH 5.7 round. This upper requires no FFL to purchase or receive, and we can ship directly to your home!

The AR-57 platform empowers the operator with 50 rounds of firepower while keeping the magazine out of the way, increasing maneuverability and speed in close quarters conflicts. In addition to it's compact, snag-free design, the spent shells are directed straight towards the floor by exiting the standard AR magwell.

The upper receiver and rails are precisely milled from a monolithic block of aircraft grade 7075 T6 aluminum. Any sighting systems mounted on the rails will stay zeroed through the toughest of missions.

Designed with reliability as its primary feature. There is no gas system to become clogged with carbon or fouling and maintenance is a snap. The bolt and chamber stay clean through extended shooting sessions.

This new offering defines "High speed, low drag".

For more information and availability updates, please sign up for our newsletter.
 
I'm interested in them. One of the main points of the 5.7x28 is its controllability in full-auto, allowing multiple hits to make up for each individual round's poor ballistic performance. I wouldn't use it on a registered receiver, since the ejecting brass might damage the magwell, but with a lightning link you could have yourself a 5.7 rifle as it was intended to be. It looks like you could easily chop the barrel into the 10" range, which is what the P90 has.
 
OK, I want it. Decent price too, probably about 725 after shipping.

Granted, I would want to SBR it to as short of a barrel as I could and still have it function.
 
I'm almost tempted to get one of these. I think they are pretty cool. Hopefully I will be able to put my hands on one at the next show.

GH
 
Its all well-and-good if you just gotta have something new, or you enjoy collecting unusual stuff.

But, for the non-machine-gun people, what does this product do that a .223 won't do?

...other than drain your wallet, and take up storage space?
 
But, for the non-machine-gun people, what does this product do that a .223 won't do?

...other than drain your wallet, and take up storage space?
Click to expand...

Priced 5.7 vs .223 lately?

Cheaper ammo plain and simple.

Suppressed 5.7 is very quiet too.

But sure, at the end of the day it's just a toy.
 
Priced 5.7 vs .223 lately?

Cheaper ammo plain and simple.

Suppressed 5.7 is very quiet too.

But sure, at the end of the day it's just a toy.
Click to expand...

Really? I was under the impression that 5.7x28 was more expensive and harder to come by.

It would have some advantages in that you had 50 rnds rather than 30 and it would be pretty controllable. It'd be fun, but it doesn't offer other significant advantages I can see, unless you already shoot 5.7 and want something different.
 
a case (2000 rnds) of quality 5.7 is ~$700
a case (1000 rnds) of quality 223 is ~$400+

however, wolf doesn't make 5.7 afaik.
 
It would be a toy for me, but a cool toy for sure. Recoil must be nonexsistent. :)
 
Pro:

50 round magazines
Cool factor

Con:

5.7 performance < 5.56 performance


I, personally, don't see the point, but if you want it, get it. I like that it is something different. If I had money coming out of my wazoo, I'd probably get one.

Mike
 
I think the 5.7 is a great step in ammunition development. Frankly, I would prefer it in a pistol... it would be nice to have a handgun that can defeat soft body armor. However, having 50 rounds of easily controllable and lightweight firepower before needing a reload sounds good to me.
 
Frankly, I would prefer it in a pistol... it would be nice to have a handgun that can defeat soft body armor.
Click to expand...

If you're not an LEO issued it as duty ammo, you won't have access to armor piercing rounds. Civilian 5.7 ammo doesn't have this capability.
 
In truth, even the stuff you can get without a hassle over the counter at the gun shop is probably a little more penetrative than, say, .380 auto thanks to higher velocity, smaller diameter bullets (c.f. 7.62x25), but 'tis true that it isn't conscientiously designed as an AP round the way that the good stuff is.
 
I think the 5.7 is a cartridge that's best suited to a pistol or a subgun. In a semi-auto AR with a 16" barrel, I don't see where it has any advantage over a similar AR in 5.56. The rifle ends up being just as big, just as heavy, but fires a nonstandard cartridge with a shorter range and less stopping power and since recoil is minimal on 5.56 AR's already, even that's not much of an issue. I guess you could carry more ammo, but if weight savings are the goal, then why not scrap the AR platform too and go to something lighter?
 
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