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Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter
$252.44
$186.99
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Most Helpful Positive Review
Awesome product, but watch your mag choice
I found this product after seeing a competing one on TGC News. Being a cheapskate, I was hesitant to spend $50 more on this than the competitor, however I’m glad I did for 2 reasons: 1 - Location of Mag release allows for dropping the mag with your trigger finger, no wasted motions for your support...
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Most Helpful Negative Review
100% junk.
Terrible fit, doesn't except any mag I put in it. But clearly states it work with glock mags. I wish I could get my money back DO NOT BUY. Plus product looked like it has been used, then return. Then optics planet sent it to me. In summation don't believe the 100% reviews, they are clearly fake.
Hit and Miss
It's a nicely made adapter but very expensive for what it is. Perhaps the premium price is commanded by the best product in the market? Sure, if it works!
Had immediate issues with Foxtrot Mike FM-9 upper. The bolt would not close into battery. After some research, found this to be an issue but none of the sales info mentioned it. It was a bad surprise at the end of a highly anticipated build. I could send the bolt in for modification but then the FM warranty might void.
Had immediate issues with Foxtrot Mike FM-9 upper. The bolt would not close into battery. After some research, found this to be an issue but none of the sales info mentioned it. It was a bad surprise at the end of a highly anticipated build. I could send the bolt in for modification but then the FM warranty might void.
Would recommend: No
Works good
This adapter may not fit all receivers well. It is tight on mine but works.
Would recommend: Yes
0 of 1 found the following review helpful.
Nice piece
Fits and works great. Money and time saver not having to buy and build a stripped lower.
Would recommend: Yes
1 of 1 found the following review helpful.
good for midlevel PCC when you have 320 mags
I don't have Glock mags but i do have 320 mags and i wanted to try doing some PCC stuff. So far fit and function is good and the system works well. Only real "complaint" is that it does take some adjusting to operate smoothly and if your system is already heavy this won't make it any lighter. If you can use a dedicated lower like the epc it would be better but if you have a spare standard lower then this is great.
Would recommend: Yes
2 of 2 found the following review helpful.
awesome item
The only reason I don’t give 5 stars is because the bolt will hold open with 1 bullet still in the mag.
If there are any suggestions, I’ll be more than happy to listen
I would definitely recommend this item !
If there are any suggestions, I’ll be more than happy to listen
I would definitely recommend this item !
Best Used for:
- plinking at the range
Would recommend: Yes
1 of 1 found the following review helpful.
Bad customer service
The last round hold open never worked. Contacted Stern and they sent out a part for something completely different. Contacted them again and they sent another part that still didn't work and then never responded to me again.
Pros:
- M&p mags fit into an AR magwell
Cons:
- bad customer service
- No last round bolt hold open
Would recommend: No
1 of 1 found the following review helpful.
Stern Defense M&P 9mm maxgwell adapter
I was building an ar-9 when the choice of how I was going to feed it came up.I chose a Stern Defense magwell adapter for M&P pistol mags(I own a 2.0 and have many xtra capacity mags already).Assembly took 5minutes(literally) and it cycled and ran perfectly.Ets plastic,m&p oem and pro mags ALL RUN PERFECTLY with no issues.This adapter cost a little more than the sylvan and endo mags but it perfectly suits my needs.Sterns customer service was top notch and I was actually very impressed at their attention to the small details and making sure I was totally satisfied with my purchase.
Would recommend: Yes
2 of 2 found the following review helpful.
Glock mags don’t fit
Seems like good construction but does even come close to accepting Glock Magazines. This was one of the reasons I bought the product. Don’t know how it functions since I haven’t found a mag that works with the item. False advertising! Do not buy!
Pros:
- Construction
Cons:
- false advertisement
Would recommend: No
1 of 24 found the following review helpful.
Great Quality Bad Description
The item says it takes Glock Mags. It does not. Had to return for the right one. Great quality and fit and finish. Wish the naming was a little more clear and the product description was correct. USA made product
Would recommend: Yes
0 of 2 found the following review helpful.
What the Mag?
Great product. Need to take some time to install, but once installed works great with Genuine Sig P320 Mags.
Promag 32 round P320 mags are tight and will not release without a lot of pressure. Did not think at first that I would get the mag to release, but eventually by applying extra pressure, it released. Then after a few inserts and releases it loosened. Same issue on all three Promags I have.
Don't even try a ETS 30 round. It is very tight and will not engage the mag catch. If you try, you run the risk of damaging the LRHO bar because of the force needed to insert the mag.
Thankfully I have a lot of Genuine Sig Sauer P320 mags
Promag 32 round P320 mags are tight and will not release without a lot of pressure. Did not think at first that I would get the mag to release, but eventually by applying extra pressure, it released. Then after a few inserts and releases it loosened. Same issue on all three Promags I have.
Don't even try a ETS 30 round. It is very tight and will not engage the mag catch. If you try, you run the risk of damaging the LRHO bar because of the force needed to insert the mag.
Thankfully I have a lot of Genuine Sig Sauer P320 mags
Pros:
- Great option to a dedicated lower
Cons:
- Mag compatability
- Cost as much as a dedicated lower
Best Used for:
- Genuine P320 Sig Sauer Mags
Would recommend: Yes
1 of 1 found the following review helpful.
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