So an optimal polymer mag for the Grendel would need to be wider, correct?
65 Receiver Set with Polymer mags from PF (HOPEFULLY)
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No I think it should be narrower to prevent the rounds from forcing themselves against the side walls. A straighter stack would help with side wall stress and also align the bullets to the ramps better. The closer together to center line of mag the more upward pressure and less side wall pressure. It's a matter of fulcrum points."Precision - The Pinnacle of Perfection."
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Originally posted by PrecisionFirearms View PostNo I think it should be narrower to prevent the rounds from forcing themselves against the side walls.
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Yes and no.
Wider would do it but it would have to be quite a bit wider. I am thinking in terms of using existing mags or mag wells. Not creating a whole new mag well AND Mags. If the mags were narrow enough the force vertically would be greater creating less tension on the side walls. That is the issue with trying to use standard mag bodies now. Too much pressure on side walls because the contact is side to side and not equal in up and down too. The rounds are not touching vertically, just horizontally creating a jamming effect. If we make that angle steeper the force would be directed vertically and not so much horizontally.
I may not be explaining it so you guy can understand it, its too late at night."Precision - The Pinnacle of Perfection."
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Originally posted by PrecisionFirearms View PostYes and no.
Wider would do it but it would have to be quite a bit wider. I am thinking in terms of using existing mags or mag wells. Not creating a whole new mag well AND Mags. If the mags were narrow enough the force vertically would be greater creating less tension on the side walls. That is the issue with trying to use standard mag bodies now. Too much pressure on side walls because the contact is side to side and not equal in up and down too. The rounds are not touching vertically, just horizontally creating a jamming effect. If we make that angle steeper the force would be directed vertically and not so much horizontally.
I may not be explaining it so you guy can understand it, its too late at night.
It seems the ideal mag would be so wide that we'd need a magwell wider than any current AR, correct? So then would the ideal mag be so wide that it'd affect reliable feeding with the center line of the ammo being shifted so far to the outside? At least with the standard bolt and extension.
Then could what your suggesting have a the inverse problem?"Those who sacrifice liberty for security, deserve neither." Benjamin Franklin
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Originally posted by cory View PostIt seems the ideal mag would be so wide that we'd need a magwell wider than any current AR, correct?
So then would the ideal mag be so wide that it'd affect reliable feeding with the center line of the ammo being shifted so far to the outside?
Then could what your suggesting have a the inverse problem?
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Originally posted by montana View PostI would tend to think a new Grendel mag wouldn't need to be any wider than any of the current 7.62X39 AK mags. Measure any AK mag , steel or plastic and see what mag well width is needed.
Does anyone have one they can try filling with Grendel ammo? If not I'll order one from Joebob."Those who sacrifice liberty for security, deserve neither." Benjamin Franklin
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Originally posted by cory View PostGood point! I didn't even think about that. It's nice having people here smarter than me who can point these things out.
Does anyone have one they can try filling with Grendel ammo? If not I'll order one from Joebob.
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I starting to lose the point of this thread. Wasn't this thread started in order to find a polymer mag for the Grendel and not to redesign a metal mag? I for one use ASC 6.5 and PRI 6.8 Mags with no problems at all. Personally I like the PRI Mags the best and never had a malfunction with one in over 5,000 rounds fired using 15 round PRI mags."Precision - The Pinnacle of Perfection."
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Originally posted by PrecisionFirearms View PostI starting to lose the point of this thread. Wasn't this thread started in order to find a polymer mag for the Grendel and not to redesign a metal mag? I for one use ASC 6.5 and PRI 6.8 Mags with no problems at all. Personally I like the PRI Mags the best and never had a malfunction with one in over 5,000 rounds fired using 15 round PRI mags.
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Sometime when I nothing better to do, I'll design and machine a billet Aluminum 7075T6 Grendel mag. Wonder how the feed lips would last?
But it would be a pretty mag. Machine each half and then weld them together and machine the weld line smooth. Machine the follower and floor plate.
Hmmm What Time?"Precision - The Pinnacle of Perfection."
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Originally posted by PrecisionFirearms View PostI starting to lose the point of this thread. Wasn't this thread started in order to find a polymer mag for the Grendel and not to redesign a metal mag?
So, are you convinced?
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No - It wont work so the idea is not worth pursuing.
Settled a old question decisively.
I don't think we have the power to have Magpul make a 6.5 Grendel Pmag. I will however look around at SHOT for another company that may be willing to produce a polymer mag. Not Lancer since they still have steel feed lips.
I would like to see a polymer mag that doesn't score the brass, allows drops, can be run over with a tank, get shot through, survives a sand storm, and still perform flawlessly and reload itself."Precision - The Pinnacle of Perfection."
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