AR 15 mag catch not seating Pmags

[Bluedragon]

You will likely not experience this with the bolt open,which is more of it's intended operation during reloads. The loaded mag is hitting the bottom of the bolt. After the 30th round is loaded in the mag, you can still push down but not enough for another round. This allowance is for bolt clearance, but is more difficult when done prematurely reloading. Possible solutions:

1.) Download -1 round. Give spring/follower room since it's trying to "bottom out". Top round would be above bottom of bolt face during normal open bolt mag changes.

2.) Insert full loaded mag, tap on bottom of mag to seat fully. Hence the phrase tap, rack, bang. (Do not do the bang part).

Hello, i forgot to mention the mags were unloaded when inserted into the rifle. Though i have found the issue also occurs with magpul's mags loaded with up to only 25 rounds. Thanks

 

[Bluedragon]

I don’t use plastic mags and prefer the precise fit on my Bushmasters for the mag going home with full capacity and no slop. Just me.

I like STANAG mags myself, but several pmags have come my way through trades.

 

[NyleRN]

Hello again everyone, i have been waiting to reply after having enough time to tinker with it, and its still acting finicky. No idea what is causing it but i will try replacing the mag catch.

Take the upper off the lower. Insert pmag. Does it lock in place?

 

[Robert Richardson]

My G.I. mags work all the time in all my ARs, just saying.

 

[rosejm]

Take the upper off the lower. Insert pmag. Does it lock in place?

And some pictures might help our internet diagnosis

 

[NyleRN]

Well the ambiguous posts are.... well, ambiguous. I can't tell what he's actually tried and what he hasn't from "well, I tinkered around with it and done this and that and it's still finicky". That tells me nothing. If want help on the internet you have to be specific and your follow up needs to be the same.

 

[NyleRN]

My G.I. mags work all the time in all my ARs, just saying.

And they should. As should pmags, Lancers, etc...

 

[Bluedragon]

Take the upper off the lower. Insert pmag. Does it lock in place?

No, it still wont lock into place with the upper removed. Thanks

 

[Bluedragon]

My G.I. mags work all the time in all my ARs, just saying.

I would've preferred the mags i got in trade to have been usgi 20's and 30's but it is what it is. I do have a few laying around though.

 

[Robert Richardson]

I would've preferred the mags i got in trade to have been usgi 20's and 30's but it is what it is. I do have a few laying around though.

Well, you could always trade them for good G.I. magazines. Just a thought.

 

[jcj54]

No, it still wont lock into place with the upper removed. Thanks

If the Pmags won't lock in with the upper removed it is a mag catch out of spec issue.

 

[Bluedragon]

Well, you could always trade them for good G.I. magazines. Just a thought.

I'm all for it if anyone has some to trade.

 

[Bluedragon]

If the Pmags won't lock in with the upper removed it is a mag catch out of spec issue.

Thanks for the reply. I am hoping the issue will be resolved with a replacement of the mag catch.