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Posted: 9/27/2011 11:58:29 AM EST
[Last Edit: 9/27/2011 12:03:20 PM EST by Leif_Runenritzer]
So if someone can make the downward-feeding, downward-ejecting AR-57 upper assembly using P-90 magazines, it seems like it wouldn't be a big stretch to do the same with the russian Degtyaryov LMG 47-round pan magazines.

So long as it could feed on steel-cases and the price wasn't exceptionally high, i'd certainly want one. So; this is a perfect idea with no issue as to mechanics, marketing, or practicality, and it'll be mass produced within the next six months, right?
Link Posted: 9/27/2011 3:07:16 PM EST
Have another beer and think of another great idea.

Link Posted: 9/27/2011 3:39:39 PM EST
Are these magazines available at reasonable cost and in any number?
Link Posted: 9/27/2011 5:12:56 PM EST
Link Posted: 9/28/2011 8:28:43 AM EST
The problem is the gas system. The 5.7 is blowback operated and doesn't have a gas system. A heavier round would require the gas tube and Bolt Carrier key to interface. that would interfere with any top-feeding system.
I thought about using the more compact DT drums with a cut-away lower feeding from below the chamber. I think that it's do-able. But it would take a lot of work, and you would be sacrificing a .308 lower.
Link Posted: 9/28/2011 8:31:44 AM EST
[Last Edit: 9/28/2011 8:32:13 AM EST by 1gewehr]
duplicate post
Link Posted: 9/28/2011 2:15:34 PM EST
Originally Posted By 1gewehr:
The problem is the gas system. The 5.7 is blowback operated and doesn't have a gas system. A heavier round would require the gas tube and Bolt Carrier key to interface. that would interfere with any top-feeding system.
I thought about using the more compact DT drums with a cut-away lower feeding from below the chamber. I think that it's do-able. But it would take a lot of work, and you would be sacrificing a .308 lower.


Of course. I completely forgot about the gas system. I wonder if the gas could be tapped from one or both sides of the barrel. But then i also have to wonder if there's a reason that no gun that i know of has its gas system on the side.
Link Posted: 9/28/2011 3:51:34 PM EST
Shrike. just sayin'
Link Posted: 9/29/2011 9:19:29 AM EST
Originally Posted By panzer:
Shrike. just sayin'


+1 I was thinking you could just put the gas tube underneath, but that would require a completely new designed upper for that mag. Still, good brainstorming. I like crazy ideas like that.
Link Posted: 9/29/2011 9:39:15 AM EST
Not AR. But possible with Dragonov or PSL turned upside down.
Link Posted: 9/29/2011 5:45:45 PM EST
I'll have to dig out my copy of The Black Rifle to check my memory, but I think the original AR10 prototype had a gas system that ran down the left side of the rifle....which would make room for a top mounted mag I guess
Link Posted: 10/3/2011 9:50:37 AM EST
[Last Edit: 10/3/2011 9:53:48 AM EST by Leif_Runenritzer]
Did some more reading. This magazine is said to be heavy and make the gun awkward somehow, and there would be little room for optics. I still like the idea, but being limited to irons and miniaturized, low-power / no-power optics would certainly impair its marketability.
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