Shop now and get Free Value Shipping on most orders over $49 to the
contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.
Enjoy our FREE RETURNS
We want to ensure that making a return is as easy and hassle-free as possible! If for any
reason you are not satisfied with your purchase, simply return the item within 30 days of
receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.
Please Enable Your Browser's Cookies Functionality
Cookies are not currently enabled in your browser, and due to this the functionality of our site will be severely restricted.
Web browser based cookies allow us to customize our site for you, save items in your cart,
and provide you with a great experience when shopping OpticsPlanet.
Your privacy is important to us, and any personal information you supply to us is kept strictly confidential.
If you cannot enable cookies in your browser, please contact us — we are always here to help!
JavaScript is blocked by AdBlocker or ScriptBlocker
We're sorry - it looks like some elements of OpticsPlanet are being disabled by your AdBlocker.
Unfortunately we are unable to offer our excellent shopping experience without JavaScript.
Please add "opticsplanet.com" and "https://opl.0ps.us/assets-9be118fd00e/" to whitelist,
or disable AdBlocker for this site (please note that we do NOT feature any annoying ads on this website).
Thanks!
Your Browser is Outdated
Unfortunately, we are unable to provide an excellent shopping experience on your browser because it lacks modern functionality needed for us
to provide a fast, secure, and enjoyable experience. If you cannot upgrade your browser or use an alternative device to visit us,
please contact us at +1-800-504-5897 and we'll be happy to assist you over the phone!
Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter Up to $18.00 Off w/ Free S&H — 2 models
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 ...
Read More...
3/3 found this helpful
Helpful Positive Review
What the Mag?
by
AM,
Verified Owner,
February 8, 2020
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 relea...
Read More...
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 per...
Read More...
Fits tight in mag well with adjustable allen wrench
Uses the same mag from the pistol
Pro
Add to your AR platform
Con (not really)
Will need to add the complete 9mm upper
And a fore-grip/ handle of your style
And sight system to your cart to to e...
Read More...
1/1 found this helpful
Helpful Negative Review
100% junk.
by
TG,
Verified Owner,
December 16, 2020
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 ...
Read More...
2/14 found this helpful
Most Recent Reviews
awesome item
by
rcc,
Verified Owner,
March 29, 2024
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 !
Product Info for Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter
Convert your standard mil spec AR 15, M4, M16 lower assembly to use 9mm and .40 S&W M&P and P320/P250 Magazines! The Mag-AD series adapters install in seconds. Boasting a last round hold open feature making them a breakthrough product and a must-have for law enforcement and civilian gun enthusiasts alike.
The Stern Mag-AD series adapters are made of aircraft grade aluminum, lightweight with ergonomic design.
Note: These adapters require the use of a 9mm or 40S&W barrel, "depending on chosen caliber" and a Glock cut bolt.
Uses Glock 9mm Magazine, Works with all generations of M&P magazines., 4140 NiB coated feed ramp., All gun components besides the Bolt and Barrel remain stock, Works with any mil spec ar15 lower receiver., Ergonomic mag release., Sturdy Construction., Hard coat anodized type 3., Constructed from 6061 T6 aircraft grade aluminum.
Cartridge:
9mm Luger
Constructed from 6061 T6 aircraft grade aluminum.
4140 NiB coated feed ramp.
Hard coat anodized type 3.
Sturdy Construction.
Ergonomic mag release.
Works with all generations of M&P magazines.
Works with P320 and P250 magazines
Works with any mil spec ar15 lower receiver.
All gun components besides the Bolt and Barrel remain stock
Your Browser is Outdated
