Magpul PMAG Gen3 and MS ??

vermintrex

vermintrex

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Hi Guys,

I read somewhere in one of the build threads that PMAG Gen3 aren't seating in the Modern Sporter, thus unusable. Is this a confirmed / known issue ?

I like PMAG's, but don't want 5/30's on a rest / bipod, and those are the only Gen2's I see anywhere. I have a bunch of 10/10 pistol mags for that, but would still like some 5/20 PMAG's for tacticool heroics. I've looked high and low, but all I've found is 5/20 in Gen3....did a 5/20 Gen2 even exist ?

If the Gen3's don't seat, has anyone tried modding the over insertion stop ? I've never tried filing, cutting polymer before and don't want to try if someone else has and it still won't work.

Thanks !!
 
vermintrex said:
Hi Guys,

I read somewhere in one of the build threads that PMAG Gen3 aren't seating in the Modern Sporter, thus unusable. Is this a confirmed / known issue ?

I like PMAG's, but don't want 5/30's on a rest / bipod, and those are the only Gen2's I see anywhere. I have a bunch of 10/10 pistol mags for that, but would still like some 5/20 PMAG's for tacticool heroics. I've looked high and low, but all I've found is 5/20 in Gen3....did a 5/20 Gen2 even exist ?

If the Gen3's don't seat, has anyone tried modding the over insertion stop ? I've never tried filing, cutting polymer before and don't want to try if someone else has and it still won't work.

Thanks !!
Click to expand...

Hello, Some people have reported them being tight. In my testing here, I've found that some require a very solid smack the first few time seating. The polymer of the insertion stop was dented when inserted (but you bet your ass it locked up solid!), and after a few insertions didn't pose a problem anymore. THAT being said, we secretly and stealth-ninja-style adjusted to make a bit more clearance at the back bottom of the magwells. If someone doesn't want to bruise their palm slapping a pmag Gen3 in, then a simple file taking off a couple of passes of material on the insertion tab would do the trick. It's a very small amount of material to be taken off the insertion tab, I'd estimate 0.005"-0.010". This phenomenon occurs on maybe 15% of the receivers we've put out, as when we started up the second run of lowers we rebuilt all new fixtures.

Thanks for inquiring.
 
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vermintrex said:
Hi Guys,

I read somewhere in one of the build threads that PMAG Gen3 aren't seating in the Modern Sporter, thus unusable. Is this a confirmed / known issue ?

I like PMAG's, but don't want 5/30's on a rest / bipod, and those are the only Gen2's I see anywhere. I have a bunch of 10/10 pistol mags for that, but would still like some 5/20 PMAG's for tacticool heroics. I've looked high and low, but all I've found is 5/20 in Gen3....did a 5/20 Gen2 even exist ?

If the Gen3's don't seat, has anyone tried modding the over insertion stop ? I've never tried filing, cutting polymer before and don't want to try if someone else has and it still won't work.

Thanks !!
Click to expand...

I have zero issues in the MS I just got a few days ago. All slide in and drop free as they should. No smacking required. These are for various PMAG 30 M3.
 
ATRS Shaun said:
Hello, Some people have reported them being tight. In my testing here, I've found that some require a very solid smack the first few time seating. The polymer of the insertion stop was dented when inserted (but you bet your ass it locked up solid!), and after a few insertions didn't pose a problem anymore. THAT being said, we secretly and stealth-ninja-style adjusted to make a bit more clearance at the back bottom of the magwells. If someone doesn't want to bruise their palm slapping a pmag Gen3 in, then a simple file taking off a couple of passes of material on the insertion tab would do the trick. It's a very small amount of material to be taken off the insertion tab, I'd estimate 0.005"-0.010". This phenomenon occurs on maybe 15% of the receivers we've put out, as when we started up the second run of lowers we rebuilt all new fixtures.

Thanks for inquiring.
Click to expand...

Well, in these dark days of bad news (I'm looking menacingly at you Ottawa)....that's great news !!

Thanks Shaun, appreciate taking the time to answer....now get back to work !! :cool:

(seriously, probably the best customer experience I've ever had, and that includes that time Mitsy and Bitsy were giving a Xmas discount )
 
It could be the best chess I’ve build up caused by the rivet. Seems as if every 3 I’ve ordered .308 or .223 one always sits extra tight bc of the rivet...
 
ATRS Shaun said:
Hello, Some people have reported them being tight. In my testing here, I've found that some require a very solid smack the first few time seating. The polymer of the insertion stop was dented when inserted (but you bet your ass it locked up solid!), and after a few insertions didn't pose a problem anymore. THAT being said, we secretly and stealth-ninja-style adjusted to make a bit more clearance at the back bottom of the magwells. If someone doesn't want to bruise their palm slapping a pmag Gen3 in, then a simple file taking off a couple of passes of material on the insertion tab would do the trick. It's a very small amount of material to be taken off the insertion tab, I'd estimate 0.005"-0.010". This phenomenon occurs on maybe 15% of the receivers we've put out, as when we started up the second run of lowers we rebuilt all new fixtures.

Thanks for inquiring.
Click to expand...

Hi Shaun. What is the turn around time for people who send in their receiver sets to get the magwell sorted out for flawless mag insertion and drop free use?
 
Lungorthin said:
Interesting, my recent ones won't seat. Nor do my friend's in his rifle
Click to expand...

Neither do mine (and I filed off the anti-overinsertion tab just to confirm it's the magwell thats not to mil spec, which made it work afterwards).
 
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