5seven in rifle

[birdshot8's]

Has anyone put this in a rifle yet? i would like to hear a report if they have. anyone reloading 5.7? i'm thinking it might be accurate with good loads in the right rifle. it did not seem shabby when fired from the pistol. curious.

 

[vis-à-vis]

The PS90 fires 5.7

Never shot one though.

 

[birdshot8's]

i was thinking more on the lines of a bolt action. that ps90 looks like it would be fun. it's is the kind of gun i would want my buddy to buy so i could shoot it without having to pay the ammo bill.

 

[Quiet]

From 2008 SHOT show

AR57

 

[vis-à-vis]

Well that's an interesting concept. So if it utlizes the PS90 magazine, what use is the traditional magazine well?

 

[CBS220]

It looks like an ordinary AR lower.

 

[Kharn]

I'd assume the mag well is now the ejection port, since the charging handle slot looks a little small.

Kharn

 

[kieran]

So if it utlizes the PS90 magazine, what use is the traditional magazine well?

ejection port.

 

[Ivy Mike]

I'd be curious to see how it performs against something like a coyote out of a smallbore CZ rifle.

 

[kieran]

i think that layout is well-suited to the firing of large amounts of 45acp, 9mm etc. maybe even 7.62x39.

 

[JWarren]

i think that layout is well-suited to the firing of large amounts of 45acp, 9mm etc. maybe even 7.62x39.

Please elaborate. I don't see that top magazine as being more conducive to firing .45, 9mm, or 7.62x39 than the traditional format. If anything, I see it as problematic for a larger cased cartridge.

-- John

 

[kieran]

Please elaborate. I don't see that top magazine as being more conducive to firing .45, 9mm, or 7.62x39 than the traditional format. If anything, I see it as problematic for a larger cased cartridge.

by having the magazine on top, and the empty casings ejecting downward, the rifle is perhaps easier to carry in close quarters, or when crawling.

obviously cartridge OAL is an issue, and you might not easily reuse magazines between calibres. but it gives you a rifle that is not as 'tall' when loaded.
if you were to use one of those california-style not-quite-a-pistol-grip grips, the rifle profile would be even lower.

perhaps magazine-on-top could be adapted for bullpup rifles ...

 

[JWarren]

I agree with your thinking, but I just don't know how well that magazine would be adapted to those calibers. It definately would not hold the capacity of the 5.7, and I wonder how easily changing magazines would be.

But you are right...the profile would be slimmer. And at the same time, I don't crawl a lot with my rifles. The benefits would be wasted on me likely.

-- John

 

[Vaarok]

What's the 5.7 do that the 7.62x25 TT or .223 Johnson Spitfire or .22 Reed Express doesn't?

 

[birdshot8's]

i was thinking the small case size of the 5.7 would be efficient and lend itself to extreme accuracy. the 7.62 and wildcats on that case are a little larger.

 

[Eric F]

when you look at weight and speed the 5.7 is weak compaired to 223 and others.

 

[taliv]

What's the 5.7 do that the 7.62x25 TT or .223 Johnson Spitfire or .22 Reed Express doesn't?

feed/fire in P90s and USG/IOMs

when you look at weight and speed the 5.7 is weak compaired to 223 and others.

what's your point? you can't fit 20 rnds of 223 into the grip of a handgun.

 

[Coronach]

Wow. that 5.7 AR at first made me go "why bother?", then I thought about it for a few seconds.

High mag capacity. Ambi (downwards) ejection. Compact size if you SBR it. Reduced blast, as compared to a 5.56 SBR. No recoil to speak of. Uses your standard AR lower.

I dunno if I want one, but I have to admit that it seems a little more nifty after a few moments of consideration.

Would it run FA if it was mated to a (legal) FA lower?

Mike

 

[El Tejon]

Clean97, I ran into the gun writer Frank James last fall at a gun club just north of me. He let me and fellow THR member Dan Flory shoot his P90.

He shot a coyote with it at inside 50 yards at his place in rural White County, Indiana. The coyote yelped and ran away.

THE Pat Rogers has told me about police shootings with the 5.7. It does not inspire confidence.

It's a .22 mag. There are jobs for .22 mags, but shooting threats is not one.

 

[MarshallDodge]

Correct me if I am wrong but aren't the ballistics almost the same for the 5.7x28 as a 22 mag ?

The bullets available for the 5.7 probably have a better BC than the 22 mag and of course it's a nice feature to be able to make your own.

 

[casio02478]

I just don't understand the need for a 5.7 round in a semi-auto/bolt action rifle, it is comparable to a 22 mag in energy right? Especially since we cannot get the special ammo in the civie world. It might be a nice short range varmint round but I see it of no use in the HD role when we have better tools. I think it is great in a full-auto sub gun with the special LEO/Mil only bullets. Dumping five round in controlled burst on full auto into a area the size of a cup is great in CQB but since civie rifles can't do that, what is the point other then it being a range toy?

 

[TexasRifleman]

What's the 5.7 do that the 7.62x25 TT or .223 Johnson Spitfire or .22 Reed Express doesn't?

Mainly it's available from just about any source you'd like without reloading, and at a semi reasonable price considering today's ammo costs.

And it reloads just fine if you decide that's what you want to do.

As for bolt action, FN has said they are working on a bolt in 5.7. Not sure if they will show it at SHOT, hope so.

 

[MarshallDodge]

I think the last three Posters said almost the same thing.

 

[birdshot8's]

the ability to reload, and potential accuracy were the drawing factors for me. i am not wanting to replace the 223 but i was thinking of a hornet type round that was easy to reload.

 

[Vibe]

I just don't understand the need for a 5.7 round in a semi-auto/bolt action rifle, it is comparable to a 22 mag in energy right? Especially since we cannot get the special ammo in the civie world. It might be a nice short range varmint round but I see it of no use in the HD role when we have better tools. I think it is great in a full-auto sub gun with the special LEO/Mil only bullets. Dumping five round in controlled burst on full auto into a area the size of a cup is great in CQB but since civie rifles can't do that, what is the point other then it being a range toy?

Well FN is coming out with a PBR in the 5.7 this year - hopefully at the Shot Shot. But it's more than just a "range toy" - even for civilians. Though the ballistics from the currently short barreled weapons looks similar to the 22 Mag - it's a bit more complex than that. Most of the LEO ammo is very light weight, requiring a lot of spin to stabilize. High spin shows up in terminal ballistics. I would expect the bolt gun to also have a high twist rate barrel to use the LEO ammo accurately. For those that reload this means heavier bullets than the 22 magnum offers. The current 5.7 loadings have to function reliably and safely in the P90 action - which is not much more complicated that your basic 10/22 - standard blow back operation. So the LEO fodder is really a bit downloaded - reloaders can hop that up a bit to well over what the 22 mag can offer and close to what the 22 Hornet can do, with much stouter brass that shouldn't have the short life problems that the Hornet is famous for.

And then there are the subcaliber wildcats. 20 Shrike and 17 VelociRaptor for example that really make the cartridge hop as a varminter.