M3 mags mods for MAC 45
- Thread starter ferndog1
- Start date
woodenword
UZI Talk Supporter
Oh, this i hilarious! It’s a 73 Powder Springs too!
I also have a ‘73 PS that looked to be unfired when I got it.
It came with 2 blued Guide Lamp mags with no other markings that were cut.
These locked in fine but unaltered GG mags did not. I got a dual catch from FTF or Lage that needed about 2 swipes with a file for these to lock in as well.
Both mags do sit at different hgts and it’s pretty noticeable but both feed 100%.
I also have a parked mag that’s unaltered with a Cobray stamp. I picked this up years later.
my .02
It came with 2 blued Guide Lamp mags with no other markings that were cut.
These locked in fine but unaltered GG mags did not. I got a dual catch from FTF or Lage that needed about 2 swipes with a file for these to lock in as well.
Both mags do sit at different hgts and it’s pretty noticeable but both feed 100%.
I also have a parked mag that’s unaltered with a Cobray stamp. I picked this up years later.
my .02
You wrote 0.0020 which is 2 tenths of an inch, roughly 3x the thickness of aluminum foil.
You didn't. You just posted a photo of some toolmarks as if they mean something about a dimension.
First, 0.0020” is not 2 tenths of an inch. Second, look at the image ferndog posted in the OP and note the difference in dimensions for the insertion stops.
Look again. Who posted that photo?
You are correct, I was distracted while posting. 0.0020 is 2 THOUSANDTHS of an inch and second, I don't care who posted the photo. Looked at it again, yup, no numbers. Just TIMKEL showing a NIB PS mag.
Now, do you have something important to add to this thread?
I don’t understand why you’re taking a rude posture here. You made numerous inaccurate comments and accusations towards me, and still are. I’ll help you out since you seem to need more explanation.
You’re confusing two different things: 1) the image ferndog posted in the OP and 2) the photograph Timkel posted.
Regarding the former, in the OP, ferndog posted a sketch showing a 0.0020” difference for the insertion stops. That’s what I was referring to and where that number came from. Apparently you did not connect the dots even with my previous comment referring you to it.
Regarding the latter, the significance that Timkel posted the photograph is that you made the following baseless accusation towards me: “You just posted a photo of some toolmarks as if they mean something about a dimension.” Clearly, you were incorrect that I posted it, and you were also incorrect that this is where the 0.0020” originated from. Instead of recognizing that, you’ve just doubled down and taken a rude posture about whether I have “something important to add to this thread.” Maybe you need to look in the mirror on this one.
MitchWerbellsGhost87
UZI Talk Life Member
I have probably mentioned this recently in the other thread but I’ll chime in again here.
MAC made the decision to alter the m3 mags so that customers would have to purchase their mags from MAC, instead of using readily available surplus m3 mags. MAC manufactured the M10 with government contracts in mind, so while it may seem easy enough to modify your pre-existing m3 mags to MAC spec in the garage with a dremel tool, it was a bit more of an undertaking logistically for a country that was ordering one thousand or more guns for a military contract and couldn’t be bothered with sourcing and modifying pallets full of surplus m3 magazines. MAC knew this and capitalized off of it by slightly altering the m3 mags to ensure that the unmodified originals were not compatible with the M10 and customers had to purchase all of their mags from MAC… Cha-Ching $$
Gaujo
UZI Talk Supporter
This is just my opinion but it would seem it being open bolt gun vs the MP5 made it a doomed proposition. That first round accuracy of the MP5 is very important for police. The cost per unit isn't as much of a factor when you are only getting a couple per police dept. Had they been available for sweeping VC tunnels in Vietnam, or Cambodia, maybe it could have been different.
I bought the dual mag release from FTF or one of the other online "cobray" stores and installed on my PS M10 day 1. Never looked back.
I hated the look of nice parked mags with a fresh mill mark on the back. Never had a single issue with GL or SPW GI mags. The new mag catch looks OG as hell too.
I hated the look of nice parked mags with a fresh mill mark on the back. Never had a single issue with GL or SPW GI mags. The new mag catch looks OG as hell too.
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