Why not a 5.7X28 standard upper?
- Thread starter coyotex
- Start date
I would assume feeding from a bottom mag would have the same feeding issues seen when you try feeding a 22-250 in an AR10. If the round is TOO short, it's prone to getting out of alignment before it starts to enter the chamber.
That's just an assumption though.
A work-around-fix would be to just modify a mag or build a new mag that lets the bullets ride in the very front of the magazine, perhaps with a false back, a modified follower and repositioned feed lips.
That's just an assumption though.
A work-around-fix would be to just modify a mag or build a new mag that lets the bullets ride in the very front of the magazine, perhaps with a false back, a modified follower and repositioned feed lips.
The Virginian
New member
This would be in my safe if/when they make one.
peterjc
New member
coyotex,
You know I've been saying that ever since a friend of mine gave me a live 5.7 x 28 cartridge and it is setting in front of me right now on my computer desk. I keep picking it up and saying the same thing as you....this would be a great fox round. A little more than a 22 mag. but not blow them up like a 223 rem.
Only difference is, I would want it in a bolt gun since we can't use semi auto rifles in Pennsylvania for hunting. (bummer).
And as far as the other guy saying short rounds have a feeding problem in AR platform type rifles...how do you explain the S&W M&P 15-22 that shoots 22 long rifles. Of which I have one.
They just necked down the magazine to the 22 cartridge.
You know I've been saying that ever since a friend of mine gave me a live 5.7 x 28 cartridge and it is setting in front of me right now on my computer desk. I keep picking it up and saying the same thing as you....this would be a great fox round. A little more than a 22 mag. but not blow them up like a 223 rem.
Only difference is, I would want it in a bolt gun since we can't use semi auto rifles in Pennsylvania for hunting. (bummer).
And as far as the other guy saying short rounds have a feeding problem in AR platform type rifles...how do you explain the S&W M&P 15-22 that shoots 22 long rifles. Of which I have one.
They just necked down the magazine to the 22 cartridge.
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pukindog
New member
Originally Posted By: The VirginianThis would be in my safe if/when they make one.
CMMG -
http://www.ar15.com/forums/topic.html?b=3&f=124&t=523242
CMMG -
http://www.ar15.com/forums/topic.html?b=3&f=124&t=523242
coyote_204
New member
I want one in 221 fire ball. Little more punch for coyotes.
Steve
Steve
furblaster
New member
Could you use 9mm AR Mags and just "adjust" the feed lips (taper them down)?
coyotex
New member
http://www.thegunsource.com/item/500464_...5_7X28_DBM.aspx
Peter,,they exist,but...
They are backordered,,go figure
X
Peter,,they exist,but...
They are backordered,,go figure
X
The Virginian
New member
Originally Posted By: pukindogOriginally Posted By: The VirginianThis would be in my safe if/when they make one.
CMMG -
http://www.ar15.com/forums/topic.html?b=3&f=124&t=523242
Thanks!
CMMG -
http://www.ar15.com/forums/topic.html?b=3&f=124&t=523242
Thanks!
RowdyRawhide
New member
FYI here is one that uses FN 90 mags it is top feed, but the part I think is nice is the bottom ejection through the empty mag well. I assume the OP knows about this since he is asking specifically for the standard mag feed.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
pukindog
New member
Originally Posted By: RowdyRawhideFYI here is one that uses FN 90 mags it is top feed, but the part I think is nice is the bottom ejection through the empty mag well. I assume the OP knows about this since he is asking specifically for the standard mag feed.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
I keep thinking I might eventually get the shorter barrel version of that and build a pistol. I bet that would be fun!
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
I keep thinking I might eventually get the shorter barrel version of that and build a pistol. I bet that would be fun!
Originally Posted By: RowdyRawhideFYI here is one that uses FN 90 mags it is top feed, but the part I think is nice is the bottom ejection through the empty mag well. I assume the OP knows about this since he is asking specifically for the standard mag feed.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
A friend of mine has that upper and I have had the chance to put a lot of rounds through it. The only problem with that design is that can't put a scope on it. The way the magazines load, you have to insert the muzzle end under that lip and then drop the other end in place. If you have a scope on there, you can't get the magazine on. It's not a problem if you are using some sort of a red dot or Eotech - but you won't have room to put a magnifier behind it. The one CMMG is working on would eliminate that problem.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
A friend of mine has that upper and I have had the chance to put a lot of rounds through it. The only problem with that design is that can't put a scope on it. The way the magazines load, you have to insert the muzzle end under that lip and then drop the other end in place. If you have a scope on there, you can't get the magazine on. It's not a problem if you are using some sort of a red dot or Eotech - but you won't have room to put a magnifier behind it. The one CMMG is working on would eliminate that problem.
204 AR
Well-known member
Good find Cbass! I didn't know that existed, I think I want one for some unknown reason. One question, I saw the pic of the rifle, and the description of being blowback operated. So why the gas block, for a front sight base? I assume if you were going strictly optics that you could eliminate it and use a midlength ff tube?
RowdyRawhide
New member
Originally Posted By: dwayOriginally Posted By: RowdyRawhideFYI here is one that uses FN 90 mags it is top feed, but the part I think is nice is the bottom ejection through the empty mag well. I assume the OP knows about this since he is asking specifically for the standard mag feed.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
A friend of mine has that upper and I have had the chance to put a lot of rounds through it. The only problem with that design is that can't put a scope on it. The way the magazines load, you have to insert the muzzle end under that lip and then drop the other end in place. If you have a scope on there, you can't get the magazine on. It's not a problem if you are using some sort of a red dot or Eotech - but you won't have room to put a magnifier behind it. The one CMMG is working on would eliminate that problem.
Good point never thought of the scope issue, I would probably just go with a red dot anyhow, but I could see the issue for someone else. The conventional mag feed would definitely be better for a scope mount then.
some newcomers may not know so I thought I would post this since it is on my short list.
AR 57 Upper
There are possibly cheaper options out there if you look around.
A friend of mine has that upper and I have had the chance to put a lot of rounds through it. The only problem with that design is that can't put a scope on it. The way the magazines load, you have to insert the muzzle end under that lip and then drop the other end in place. If you have a scope on there, you can't get the magazine on. It's not a problem if you are using some sort of a red dot or Eotech - but you won't have room to put a magnifier behind it. The one CMMG is working on would eliminate that problem.
Good point never thought of the scope issue, I would probably just go with a red dot anyhow, but I could see the issue for someone else. The conventional mag feed would definitely be better for a scope mount then.