20/5 PMags wont fit in my NEA lower

quinnjoblow

quinnjoblow

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For some strange reason I have 4 20/5 PMags that wont even go into mag well of my NEA lower. Im not sure if they are Gen2 or 3. I purchased them all new about 3 years ago. First time using them. They only go into the mag well about half an inch. No rub marks on magazines to indicate where they are hanging up.
I finished the build a week or so ago and decided to take it out for a trial shoot. All my other 30/5 PMags, L.A.R 10 rounders and E-Lander mags fit and work no problem. The lower is from the last current batch of billit machined lowers from NEA. I'm not bashing NEA here.
I think its odd that my 30/5 PMags from 2 and 3 gen( window and non ) work without a hitch. Any help sould be appreciated. I dont want to go back to store after 3 years and say they dont fit
 
When did gen 3 PMAGs come out? OP says they were bought 3 years ago, and I know that gen 2 is a tighter fit than gen 3. What colour's the follower, grey or olive?
 
Jube said:
When did gen 3 PMAGs come out? OP says they were bought 3 years ago, and I know that gen 2 is a tighter fit than gen 3. What colour's the follower, grey or olive?
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id have to look today when I get home.

I dont want this to be a bash NEA thread. It takes major balls to go into dept and start manufacturing guns from scratch in Canada.
 
That is true, BUT, all these parts are cnc made. It doesn't take one second longer machining time to make a part right than it does to make it out of spec. And if it is out of spec, all it takes is a couple of keystrokes to make sure the next one is correct. That doesn't seem to have been a priority with them. As a machinist with almost 40 yrs, that is the part that I just don't understand, and that is all I am going to say
 
dogzilla said:
That is true, BUT, all these parts are cnc made. It doesn't take one second longer machining time to make a part right than it does to make it out of spec. And if it is out of spec, all it takes is a couple of keystrokes to make sure the next one is correct. That doesn't seem to have been a priority with them. As a machinist with almost 40 yrs, that is the part that I just don't understand, and that is all I am going to say
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I have never been able to figure this out either
 
dogzilla said:
That is true, BUT, all these parts are cnc made. It doesn't take one second longer machining time to make a part right than it does to make it out of spec. And if it is out of spec, all it takes is a couple of keystrokes to make sure the next one is correct. That doesn't seem to have been a priority with them. As a machinist with almost 40 yrs, that is the part that I just don't understand, and that is all I am going to say
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With your almost 40 years as a machinist, what is it in the OP that makes you think it is a problem with the lower? I'm no machinist but if "30/5 PMags, L.A.R 10 rounders and E-Lander mags fit and work no problem" with this cnc lower but 4 brand new 20/5 PMags don't, wouldn't that point to a mag issue?

I'm having a hard time wrapping my head around the fact that all of those other mags function just fine but these 4 only go in half an inch???? That doesn't sound like something is just a little out of spec...
 
my 5/20 pmags all take some fiddling to go in all my lower and they don't drop free. As for the OP, I noticed that the lastest gen Pmag maybe out of spec because all the gen 3 that I have are super hard to insert , where the old gen 1,2 would insert fine and drop free.
 
Runningfool said:
With your almost 40 years as a machinist, what is it in the OP that makes you think it is a problem with the lower? I'm no machinist but if "30/5 PMags, L.A.R 10 rounders and E-Lander mags fit and work no problem" with this cnc lower but 4 brand new 20/5 PMags don't, wouldn't that point to a mag issue?

I'm having a hard time wrapping my head around the fact that all of those other mags function just fine but these 4 only go in half an inch???? That doesn't sound like something is just a little out of spec...
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Agreed, but if the Lowers are not CNCd in house controlling those tolerances could be the culprit here.

As an aside, I tried 5 different Gen2 PMags in both my NEA & Noveske Lowers last night without any issues.
 
when I get off the road today I'm going to try all the same magazines again in my remaining Bushmaster and Aero Precision stripped lowers. Just haven't had the time to dig them out of my safe. I will post results
 
NEA is a hell of a lot more likely to make out of spec #### than Magpul.



We got something here in Canada that Magpul doesn't design their mags for, RIVETS.
 
I wonder if if they are going 1/2 an inch and stopping if those 5/20 P-mags have over sized clips points for the cover. I am using this photo from online because it is an FDE mag with a black cover so you see where the cover clips in: maybe where it clips in is too big on that ridge? That is only my guess, but the distance you describe is right.

MagPul%20FDE%2020%20Rd%281%29.jpg
 
I think I remember guys on AR15.com ran into similar problems with Gen 2 P-Mags, and it wasn't just with NEA guns. I think they did some tweaks to correct the problem which gave us the Gen 3s.
 
Update to my original post. Out of all of my AR lowers(9 of them) this particular NEA lower is the only one that I need a rubber mallet to seat the 20/5rnd PMag. The other 3 NEA lowers they insert and drop free no problem. The only lower that the mags are a little bit tight is my one Aero power. They are snug but drop free. I've tried PMags, LAR, ELander and CProducts and they all fit in the remaining 8 lowers.
On the lower I'm having problems with it is the front of the 20/5 mag (and Non PMag 30/5) that is dragging on the mag well. I hate like hell to take a file to the magwell of a brand new build rifle. Do you think I should contact NEA and see if they should replace it? Seems odd that two lowers that I order the same day and are within 25 serial numbers in that same batch don't take the same mags.
I don't want this to sound like a NEA bash thing. The other lowers are awesome.
 
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