5.7X28 Uppers for the AR platform???

sneaky pete · August 21, 2009, 02:47 PM

old Sneaky Pete here: I'd apperciate any commentary -good or bad about the 5.7X28 uppers availiable for the AR lowers. Sounds kind of interesting and as I just bought the wife a really expensive digital camera It's my turn for a new toy. and how would it be on ferral hog pests tearing up your pastures?? THANX in advance--SNEAKY

csmsss · August 21, 2009, 02:52 PM

I guess I'm not understanding the purpose of this. The 5.7 ballistics are inferior to 5.56 NATO, and the ammo choices limited and expensive.

azredhawk44 · August 21, 2009, 04:36 PM

Sneaky:

One of the cooler features I'm noticing of them... they offer quite a bit higher mag capacity due to the top-feeding 50 round magazine. And they eject down the mag well.

Imagine taking a 30 round traditional AR mag, cutting the feed lips off and removing the spring and follower. Built in brass catcher.

Whether for fomenting the revolution or just for convenience at the range, that's kinda cool.

The heavier offerings in 5.7x25 are subsonic. Perfect for a silenced SBR platform.

Kmar40 · August 21, 2009, 08:12 PM

Quote:

I guess I'm not understanding the purpose of this. The 5.7 ballistics are inferior to 5.56 NATO, and the ammo choices limited and expensive.

There is no purpose for it. It just sounds cool to Counterstrike Commandos.

TheManHimself · August 21, 2009, 08:29 PM

Quote:

There is no purpose for it. It just sounds cool to Counterstrike Commandos.

Untrue - at least for the subgun crowd.

There are many legally registered selective fire AR15/M16 lowers on the market.

Most of the modern small-caliber subguns, on the other hand, such as the P90, MP7, etc. are unavailable except as post-86 dealer samples.

seant · August 21, 2009, 08:30 PM

I would consider it as a reasonable mall ninja accesory.

olyinaz · August 22, 2009, 12:15 AM

Some of the replies the OP got were pretty rude and I find that sad given what this forum is supposed to be for. Since when do any of us need some kind of reason for wanting a gun or particular caliber? Huh?? UFB! Sounds like the same garbage I get from the gun haters on my block, "Why do you need a gun like that?" I don't need a Rolex watch but if I want one I'll bloody well GET one! Same daggum thing goes for any particular firearm I can legally buy.

At any rate, I was actually looking at these at a local shop today and to actually answer the OP's question (what a concept...) the downsides I see are these: 1) Cost. The dang things are expensive. So much so that I can buy a basic M4-style carbine for about the same price. Same problem with ammo. 2) Reloading the ammo sounds like a nightmare but I dunno for sure because I've not tried it. 3) The performance of the round doesn't light my hair on fire.

Upside? It looks like a heckuva lot of fun to shoot!

It's your money. If you want one...

Best,
Oly

Mike40-11 · August 22, 2009, 06:39 AM

I think it would be an interesting little rifle. Tiny little recoil, 50 round mags, a somewhat unique cartridge, it just looks neat.

That said, I don't know if it's quite neat enough given the cost of the upper and the ammo. Fun, but I don't think I'd spend the money. Then again, I keep looking at the .50 Beowulf uppers and I have absolutely no earthly idea what I'd do with that.

CraigC · August 22, 2009, 05:27 PM

It's an interesting concept and I think it would be a lot of fun to shoot but I really don't think the 5.7 is an appropriate cartridge for feral hogs. Unless you're shooting piglets to roast. It would work wonderfully on predators up to fox and coyote as well as rodents and the handy-dandy magwell ejection makes for easy brass retrieval for the handloader.

DBAR · August 22, 2009, 05:38 PM

I've always considered getting one of those uppers, even before they where in production. I remember when they where just an idea. I may have to get one of those for my SBR. That would be kind of cool.... I guess some of you guys would have to then call me a "Mall Ninja". Granted, I'd be a heavily armed "Mall Ninja", and you'd being doing so at your own risk.

DBAR

jammin1237 · August 22, 2009, 06:43 PM

a very cool upper...i have been thinking about this round for some time, the only down side is the cost and availability of ammo...

upsides in my opinion... the ballistics are slightly more than the .22 wmr, but in a center fire cartrige allowing you to reload and or make custom loads... you can also purchase a pistol in that caliber, and the fact that it holds 50 rounds in a compact format that expends used brass right out the bottom is a big plus...

if i had more room in the gun safe, i would already have one!

get one

cheers

ranger dave · August 23, 2009, 09:29 PM

the 5.7 round is not as powerful as the 5.56 this is true but. i can get 50 rounds for $ 18 thats alot cheaper then. most comm. 223 at this time its cheap to reload . and most people dont fire there 16 inch ar's past 100 yards my 5.7 is good to 150 yards and its fun as hell. i use a old ar mag as a brass catcher. and as a sub gun its great

xtremehunter83 · August 23, 2009, 09:41 PM

+1 on what ranger dave said, also the price of the uppers in 5.7 seem to be coming down and making them more reasonably priced

Dikran Yacoubian · August 23, 2009, 11:54 PM

I'd say its worth it just for the novelty. I was hesitant at first, but the PS90 has ended up near the top of my "fun gun" scale.

-- Dikran Yacoubian
Columbia, SC

Skan21 · August 24, 2009, 12:14 AM

Can't say i would buy one, but it would probably be a kick a** woodchuck round. Probably be good for possum and prairie dogs too, but there's no prairie dogs up here.

sneaky pete · August 24, 2009, 02:07 PM

old Sneaky Pete here: I was just going back over the posts and saw in TheManHinself's post the mention of "subgun" and I had a "brainfa**". Anyone remember those devices that you could put on your trigger-guard that caused what seemed like full auto fire--BUT because the trigger was actually being pulled back faster then you could do it it was by BATF definition NOT a machine gun-beause there was an actual triger-pull for each round fired. Now think of that 5.7-50 round magazine and one of those bolt-on devices???? Sounds like that might be lot of fun??? I guess that this might be considered a great "Mall Ninja" gun. I think that I have been eating too much chocolate lately. THANX--SNEAKY

Recoiljunkie44 · August 25, 2009, 08:19 PM

Love the fact it is bottom eject and always been a big fan of having pistols and rifle in the same cartridge so why not its not like FN produces anything that would ever be considered junk although some more adaptable then others! If i had the money id go for it

ranger dave · August 25, 2009, 08:35 PM

there are a ton of class 3 m16 out there that with an upper change you hav a full auto 5.7

sneaky pete · August 26, 2009, 07:20 AM

old Sneaky Pete here: Oh my Ranger Dave I seriously do NOT have any desire to give the BATF an excuse to be looking over my shoulder by being a registered class-3 owner. Wth that device I could instal it or remove it at my choice and the BATF would never know. Secondly the device in the $30 range. THANX--SNEAKY

smee78 · August 26, 2009, 09:42 AM

If they made a 22lr version I would be all over it. Even 25acp would be fun as a range gun.

ranger dave · August 26, 2009, 10:39 PM

thats true pete but i got a class 3 collection when my grandfather passed so i feel its my duty to keep the atf bussy doing paper work for my guns and maybe just maybe they will run out of money and close up shop lol

illbfrank · August 31, 2009, 11:59 AM

The device is called a BMF Activator...it's a crank that mounts in the trigger guard...one crank = 4 rounds downrange.

illbfrank · August 31, 2009, 12:00 PM

cost about 20 bucks and is available at Midway, Cabelas, and other outlets.

August 21, 2009, 02:47 PM	#1
sneaky pete Senior Member Join Date: November 24, 2004 Location: Florida Keys Posts: 510	5.7X28 Uppers for the AR platform??? old Sneaky Pete here: I'd apperciate any commentary -good or bad about the 5.7X28 uppers availiable for the AR lowers. Sounds kind of interesting and as I just bought the wife a really expensive digital camera It's my turn for a new toy. and how would it be on ferral hog pests tearing up your pastures?? THANX in advance--SNEAKY

August 22, 2009, 06:39 AM	#8
Mike40-11 Senior Member Join Date: January 8, 2005 Location: Missouri Posts: 841	I think it would be an interesting little rifle. Tiny little recoil, 50 round mags, a somewhat unique cartridge, it just looks neat. That said, I don't know if it's quite neat enough given the cost of the upper and the ammo. Fun, but I don't think I'd spend the money. Then again, I keep looking at the .50 Beowulf uppers and I have absolutely no earthly idea what I'd do with that. Last edited by Mike40-11; August 22, 2009 at 06:39 AM. Reason: spelling

August 23, 2009, 09:29 PM	#12
ranger dave Senior Member Join Date: November 25, 2005 Posts: 485	you have it all wrong the 5.7 round is not as powerful as the 5.56 this is true but. i can get 50 rounds for $ 18 thats alot cheaper then. most comm. 223 at this time its cheap to reload . and most people dont fire there 16 inch ar's past 100 yards my 5.7 is good to 150 yards and its fun as hell. i use a old ar mag as a brass catcher. and as a sub gun its great

August 24, 2009, 12:14 AM	#15
Skan21 Senior Member Join Date: May 29, 2009 Location: New Hampshire Posts: 463	Can't say i would buy one, but it would probably be a kick a** woodchuck round. Probably be good for possum and prairie dogs too, but there's no prairie dogs up here. __________________ "An armed society is a polite society. Manners are good when one may have to back up his acts with his life."- Robert Heinlein Some of you guys need to trade in a few of those Safe Queens and see if you can get a good deal on a Sense of Humor.- Me

August 24, 2009, 02:07 PM	#16
sneaky pete Senior Member Join Date: November 24, 2004 Location: Florida Keys Posts: 510	I just had a "Scarry" thought old Sneaky Pete here: I was just going back over the posts and saw in TheManHinself's post the mention of "subgun" and I had a "brainfa**". Anyone remember those devices that you could put on your trigger-guard that caused what seemed like full auto fire--BUT because the trigger was actually being pulled back faster then you could do it it was by BATF definition NOT a machine gun-beause there was an actual triger-pull for each round fired. Now think of that 5.7-50 round magazine and one of those bolt-on devices???? Sounds like that might be lot of fun??? I guess that this might be considered a great "Mall Ninja" gun. I think that I have been eating too much chocolate lately. THANX--SNEAKY

August 21, 2009, 02:52 PM	#2
csmsss Senior Member Join Date: October 24, 2008 Location: Orange, TX Posts: 3,078	I guess I'm not understanding the purpose of this. The 5.7 ballistics are inferior to 5.56 NATO, and the ammo choices limited and expensive.

August 21, 2009, 04:36 PM	#3
azredhawk44 Junior member Join Date: September 28, 2005 Location: Mesa, AZ Posts: 6,465	Sneaky: One of the cooler features I'm noticing of them... they offer quite a bit higher mag capacity due to the top-feeding 50 round magazine. And they eject down the mag well. Imagine taking a 30 round traditional AR mag, cutting the feed lips off and removing the spring and follower. Built in brass catcher. Whether for fomenting the revolution or just for convenience at the range, that's kinda cool. The heavier offerings in 5.7x25 are subsonic. Perfect for a silenced SBR platform.

August 21, 2009, 08:30 PM	#6
seant Senior Member Join Date: June 28, 2009 Posts: 115	I would consider it as a reasonable mall ninja accesory.

August 22, 2009, 12:15 AM	#7
olyinaz Senior Member Join Date: February 24, 2009 Location: Arizona Posts: 877	Some of the replies the OP got were pretty rude and I find that sad given what this forum is supposed to be for. Since when do any of us need some kind of reason for wanting a gun or particular caliber? Huh?? UFB! Sounds like the same garbage I get from the gun haters on my block, "Why do you need a gun like that?" I don't need a Rolex watch but if I want one I'll bloody well GET one! Same daggum thing goes for any particular firearm I can legally buy. At any rate, I was actually looking at these at a local shop today and to actually answer the OP's question (what a concept...) the downsides I see are these: 1) Cost. The dang things are expensive. So much so that I can buy a basic M4-style carbine for about the same price. Same problem with ammo. 2) Reloading the ammo sounds like a nightmare but I dunno for sure because I've not tried it. 3) The performance of the round doesn't light my hair on fire. Upside? It looks like a heckuva lot of fun to shoot! It's your money. If you want one... Best, Oly

August 22, 2009, 05:27 PM	#9
CraigC Junior member Join Date: November 28, 2001 Location: West Tennessee Posts: 4,300	It's an interesting concept and I think it would be a lot of fun to shoot but I really don't think the 5.7 is an appropriate cartridge for feral hogs. Unless you're shooting piglets to roast. It would work wonderfully on predators up to fox and coyote as well as rodents and the handy-dandy magwell ejection makes for easy brass retrieval for the handloader.

August 22, 2009, 05:38 PM	#10
DBAR Senior Member Join Date: February 17, 2009 Posts: 941	I've always considered getting one of those uppers, even before they where in production. I remember when they where just an idea. I may have to get one of those for my SBR. That would be kind of cool.... I guess some of you guys would have to then call me a "Mall Ninja". Granted, I'd be a heavily armed "Mall Ninja", and you'd being doing so at your own risk. DBAR

August 22, 2009, 06:43 PM	#11
jammin1237 Senior Member Join Date: July 16, 2008 Location: Wisonsin Posts: 269	a very cool upper...i have been thinking about this round for some time, the only down side is the cost and availability of ammo... upsides in my opinion... the ballistics are slightly more than the .22 wmr, but in a center fire cartrige allowing you to reload and or make custom loads... you can also purchase a pistol in that caliber, and the fact that it holds 50 rounds in a compact format that expends used brass right out the bottom is a big plus... if i had more room in the gun safe, i would already have one! get one cheers

August 23, 2009, 09:41 PM	#13
xtremehunter83 Member Join Date: February 16, 2009 Posts: 24	+1 on what ranger dave said, also the price of the uppers in 5.7 seem to be coming down and making them more reasonably priced

August 23, 2009, 11:54 PM	#14
Dikran Yacoubian Member Join Date: May 10, 2009 Posts: 35	I'd say its worth it just for the novelty. I was hesitant at first, but the PS90 has ended up near the top of my "fun gun" scale. -- Dikran Yacoubian Columbia, SC

August 25, 2009, 08:19 PM	#17
Recoiljunkie44 Member Join Date: August 8, 2009 Location: Hudson ks Posts: 96	Love the fact it is bottom eject and always been a big fan of having pistols and rifle in the same cartridge so why not its not like FN produces anything that would ever be considered junk although some more adaptable then others! If i had the money id go for it __________________ Father Janovich: " Why didn't you call the police" Walt: " well you know,I prayed for them to come but no one answered"

August 25, 2009, 08:35 PM	#18
ranger dave Senior Member Join Date: November 25, 2005 Posts: 485	class 3 there are a ton of class 3 m16 out there that with an upper change you hav a full auto 5.7

August 26, 2009, 07:20 AM	#19
sneaky pete Senior Member Join Date: November 24, 2004 Location: Florida Keys Posts: 510	BUT then under tne watchful eye of the BATF old Sneaky Pete here: Oh my Ranger Dave I seriously do NOT have any desire to give the BATF an excuse to be looking over my shoulder by being a registered class-3 owner. Wth that device I could instal it or remove it at my choice and the BATF would never know. Secondly the device in the $30 range. THANX--SNEAKY

August 26, 2009, 09:42 AM	#20
smee78 Senior Member Join Date: July 14, 2008 Location: South Carolina Posts: 2,918	If they made a 22lr version I would be all over it. Even 25acp would be fun as a range gun. __________________ We know exactly where one cow with Mad-cow-disease is located, among the millions and millions of cows in America, but we haven't got a clue where thousands of illegal immigrants and terrorists are

August 26, 2009, 10:39 PM	#21
ranger dave Senior Member Join Date: November 25, 2005 Posts: 485	true thats true pete but i got a class 3 collection when my grandfather passed so i feel its my duty to keep the atf bussy doing paper work for my guns and maybe just maybe they will run out of money and close up shop lol

August 31, 2009, 11:59 AM	#22
illbfrank Junior Member Join Date: November 27, 2008 Posts: 4	The device is called a BMF Activator...it's a crank that mounts in the trigger guard...one crank = 4 rounds downrange.

August 31, 2009, 12:00 PM	#23
illbfrank Junior Member Join Date: November 27, 2008 Posts: 4	cost about 20 bucks and is available at Midway, Cabelas, and other outlets.