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204 AR

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Reply with quote  #1 
I got my new to me rifle this afternoon, and after dinner tonight decided to tackle the idea of a high cap mag. The factory mag is narrower internally, with a narrow spring to match. Those things are pretty hard to overcome, especially the spring. No idea where you would find one like that.

So I just decided to do what I could to modify a 30 round GI mag to mimic the feed lips and follower of the factory mag. It took some doing, a lot of little tweaks, but I think I have one worth trying. It chambers rounds perfectly. The one glitch is the sometimes the rounds on the right side of the mag won't pop over to the left at the top, so I have one more mod to try and I think I can overcome it.
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Borrego Bob

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Reply with quote  #2 
Make a video and take pics please.
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204 AR

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Reply with quote  #3 
I'm not going to get any more hopes up as I need to find a way to strengthen the feed lips back up as when fully loaded the spring pressure pushes it up just enough to drag on the bolt. I may try a steel mag but I don't have a 30 rounder right now to try. Other than that, it seems to work great.
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204 AR

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Reply with quote  #4 
Well I kind of feel like an idiot. I just tried a 20 round pmag. 8 rounds fit, though it does bulge a bit. I don't know if  a 30 rounder would take many more than that or not and I don't have one to try but I will be picking one up. Anyway, 8 dummy rounds run through the mag perfectly. And the olive drab even sort of matches the camo finish. IMO it's a way better solution and super easy. It does limit oal to 2.260" but I think I can live with that.
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amyctc5

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Reply with quote  #5 
Quote:
Originally Posted by 204 AR
I got my new to me rifle this afternoon, and after dinner tonight decided to tackle the idea of a high cap mag. The factory mag is narrower internally, with a narrow spring to match. Those things are pretty hard to overcome, especially the spring. No idea where you would find one like that.

So I just decided to do what I could to modify a 30 round GI mag to mimic the feed lips and follower of the factory mag. It took some doing, a lot of little tweaks, but I think I have one worth trying. It chambers rounds perfectly. The one glitch is the sometimes the rounds on the right side of the mag won't pop over to the left at the top, so I have one more mod to try and I think I can overcome it.


I was wondering if anybody have tried to modify a mag.

I tried four or five rounds in one of my pmags it worked the couple of times I experimented with it. I didn't have any problems.

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Borrego Bob

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Reply with quote  #6 
Any updates on this?
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“What’s the secret of success? Right decisions. How do you make right decisions? Experience. How do you get experience? Wrong decisions.” – John Wayne

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HuntTXhogs

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Reply with quote  #7 
On a pig hunt last night I emptied 13 rounds in 10 seconds - wish 30 RAR carried 20+ rounds
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204 AR

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Reply with quote  #8 
No updates, I haven't acquired any stainless mags to try. The Pmag works so well I probably won't bother unless I want a longer oal with some heavier bullets. This rifle shoots 110 vmax and 110 barnes so well I'm not sure anything else is necessary for varmints to deer out to 300 yds or so. 

I just have to make sure I don't run out of brass.
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