What's the consensus on the MDT 12 round mags? Ive never had a problem with AICS mags, and was wondering if the MDTs are just as reliable.
MDT 12rd 308 mags or AICS
- Thread starter Gil P.
- Start date
I've read some some earlier comments that the feed lips on the MDT mags were really rough and benefit from a light sanding, is this still true?
My aics mags have always scratched my brass but I never thought it was a problem.
Is the placement of the magazine catch on the mags more consistent on the MDTs from mag to mag vs the aics?
My aics mags have always scratched my brass but I never thought it was a problem.
Is the placement of the magazine catch on the mags more consistent on the MDTs from mag to mag vs the aics?
I file all the inside edges and around the front corner. It eliminates the scratching of the brass but more importantly to me, it takes less forward effort and smother when its not digging into the brass.
6 & 6.5x47L, 6.5CM, 260, and I have tried 6 Dasher in but have their dedicated Dasher mag.
I’ve heard folks had an issue with them when running the 6.5x47L and associated wildcats but I’ve never experienced any issues.
I have both MDT 12s and AICS 10s with base plates and have ran 6.5x47 just fine through both of them. Right now I run the AI mags for 6.5x47 and the MDT mags for 6BRA. I didn't have an issue running the MDT 12s in the x47, it was just more convenient to get MDT spacers/springs and convert them to dasher mags for the BRA rather than buying kits for the AI mags. I could swap the guts back in the MDT mags and run 6.5x47 no problem.
For the record, when I first got my AI mags, I tweaked the angle and sanded the shit out of the inside of the feed lips in order to get them to feed smoothly (with 308 at the time). They've ran great many thousands of rounds ever since. I never had to touch the feed lips on my MDTs at all. So Id probably buy MDTs moving forward just for simplicity sake. But both the AI and MDT 12s have been 100% reliable for me in several calibers. The one caveat I will say was for me, I did have issues running 6.5x47 through a couple of MDT 10s when they first came out. Zero issues with the 12s, so not sure what that was about, maybe just first run jitters.
For the record, when I first got my AI mags, I tweaked the angle and sanded the shit out of the inside of the feed lips in order to get them to feed smoothly (with 308 at the time). They've ran great many thousands of rounds ever since. I never had to touch the feed lips on my MDTs at all. So Id probably buy MDTs moving forward just for simplicity sake. But both the AI and MDT 12s have been 100% reliable for me in several calibers. The one caveat I will say was for me, I did have issues running 6.5x47 through a couple of MDT 10s when they first came out. Zero issues with the 12s, so not sure what that was about, maybe just first run jitters.
MDT 12 rounders had some issues with 6GT. I ended up swapping them to the ARC mags and ARC mags are definitely smoother out of my action (Terminus Zeus)
I'm not exactly sure. At first it was some bolt overs, but that was fine fixing latch and feed lips. Others reported that once you get to 12 rounds there would be issues but I didn't run with them long enough. I started diagnosing it and I mailed them and they responded that their MDT Steel mags have issues with 6GT and that they addressed it in their hybrid poly/metal mags and I guess they'll fix it in their revised steel mags (though maybe not until Shot show?)
Was this just for the 12 rnd or all steel mags for the GT? I ran the 10 rnd at a match this weekend all the way through 10 and didn’t have any issues. Actually I want to put an extension on it.
Any suggestions would be appreciated.
I tried the 12, but MDT said it was for all steel that could cause a problem. But
if it works it works! 
I decided to swap my MDT's to ARC as it ran smoother.
Thank you. I think I will try 1 ARC mag to see. Did you add any extensions to them to run the GT?I tried the 12, but MDT said it was for all steel that could cause a problem. But
I decided to swap my MDT's to ARC as it ran smoother.
Nope I did nothing to them, they ran fine. Joel mentioned that he thought the LRI followers + ARC were the smoothest things ever, so I did order some LRI followers to play with when they arrive.
My 6.5cm MDTs work just fine. Have about 200rd. My 300wm was AICS, but only 10rd. Never had probs with AICS mags or anything other than the price.
Just got my MDT 12 round mag. The 6.5x47 rounds feed pretty darn smooth from the first round to the last. I ran across another thread where someone was having an issue with 6.5x47s in the MDT mags, but mine seems fine.
Did MDT change something to make the 6.5x47s feed better or is it luck if the draw? I'll probably order another MDT mag, they are really slick. Hopefully they are consistent from mag to mag unlike some AICS mags ive had.
Did MDT change something to make the 6.5x47s feed better or is it luck if the draw? I'll probably order another MDT mag, they are really slick. Hopefully they are consistent from mag to mag unlike some AICS mags ive had.
These things are mass produced stampings from sheet steel then they are heat treated. There's going to be part to part variation.
I doubt anyone is putting these together then checking how each one feeds, let alone adjusting anything.
I've got mdt and accumag both feed fine with 6.5x47. Mdt I've 10 and 12 rounders . Accumag I've got 2 10 rounders, 1 with a 4 round extension. I put a empty 308 case in bottom of extension it runs 13 rounds perfect. A little long though
@Saf3sh00t3r and most of the guys from Texas we shoot with will agree - the MDT magazines are an eternal frustration and total junk. Use them at your peril.
What's wrong with them?
It's very dusty where I shoot and I've gotten stuck in some dust storms while shooting a couple of times. I've never had any problems with AICS mags.
Do you run any kits for br in your Aics mags or does the standard 308 mag feed them fine?
You were right, my rounds started nose diving after little use. Is there a fix for this?
I’ve been running 3 of the 308 version with 6creed for the last two years and 2 of the BR version since January of this year without an issues.
Do you have the flat springs in them? If so contact mdt and see if they have the lighter tension spring ones
I'm not sure which springs it has but the tension feels pretty light.
The spring looks just like the flat ones in an AICS mag. Snipershide isn't letting me post pictures, it's telling me the file is too large.
I prefer the Magpul & MDT mags over AICS.
A friend of mine who is a champion level shooter prefers Magpul as well.
So yes, I'm sure MDT mags will be reliable.
Yeah, AICS didn't work for my friend either, I guess that all brands can and will have issues at some point?...
MDT said:
We have ribs inside the mag body to help reduce friction and ensure function even if the mag gets very dirty. The 6.5x47 is a shorter round than 308, which it was designed for. We have come across a few instances where the Lapua rounds can seat too far back, and the shoulder of the round sits behind that rib, which then changes how they stack inside. If you make sure that your rounds are not seated all the way back, you should be good to go.
We have ribs inside the mag body to help reduce friction and ensure function even if the mag gets very dirty. The 6.5x47 is a shorter round than 308, which it was designed for. We have come across a few instances where the Lapua rounds can seat too far back, and the shoulder of the round sits behind that rib, which then changes how they stack inside. If you make sure that your rounds are not seated all the way back, you should be good to go.
