Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter

Stern Defense MAG-ADMP9&40/P320 AR-15/M4/M16 Magazine Conversion Adapter, M&P, 9mm/.40S&W, Black, 001-SD MAG-AD-9AND40-M

Stern Defense MAG-ADMP9&40/P320 AR-15/M4/M16 Magazine Conversion Adapter, M&P, 9mm/.40S&W, Black, 001-SD MAG-AD-9AND40-M

1 of 4 images

Stern Defense MAG-ADMP9&40/P320 AR-15/M4/M16 Magazine Conversion Adapter, M&P, 9mm/.40S&W, Black, 001-SD MAG-AD-9AND40-M

2 of 4 images

Stern Defense MAG-ADMP9&40/P320 AR-15/M4/M16 Magazine Conversion Adapter, M&P, 9mm/.40S&W, Black, 001-SD MAG-AD-9AND40-M

3 of 4 images

Stern Defense MAG-ADMP9&40/P320 AR-15/M4/M16 Magazine Conversion Adapter, M&P, 9mm/.40S&W, Black, 001-SD MAG-AD-9AND40-M

4 of 4 images

Stern Defense MAG-ADMP9&40/P320 AR-15/M4/M16 Magazine Conversion Adapter, M&P, 9mm/.40S&W, Black, 001-SD MAG-AD-9AND40-M

Tap Tap to Zoom

Government Export Restriction

This item may be regulated for export by the U.S. Department of State or the U.S. Department of Commerce. Please see our Export Policy prior to placing your order.

Government Restriction

By adding to cart, I understand and agree to the Domestic Restricted Product Policy and certify that I will comply with applicable federal, state and local laws and regulations.

You May Also Like

Best Rated

TRYBE Defense 7.5 in Thin Profile AR Pistol Barrel, 9mm, 1/2X28 Threads, Nitride, Black, BARPIST759MM

(37)

List: ~~$149.99~~ $85.99 Save Up to 43%

Blazin' Deal

TRYBE Defense Carbine AR 9mm A2 Flash Hider, black, A2FH9MM

(15)

List: ~~$17.99~~ $4.04 Save Up to 78%

Questions & Answers

does this work with sig p320 9mm magazines? Manufacturer Answer

Yes, it does.

by STERN DEFENSE, Manufacturer, November 27, 2024

Will this work with m&p9 2.0 mags? Manufacturer Answer

We have not yet tested with these.

by STERN DEFENSE, Manufacturer, November 27, 2024

View All Q&A You Have a Question? Ask!

Customer Reviews

Helpful Positive Review

good for midlevel PCC when you have 320 mags by Ray, Verified Owner, June 23, 2024

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 al...
Read More...

3/3 found this helpful

Helpful Positive Review

Awesome product, but watch your mag choice by Jae, March 2, 2020

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...

8/8 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...

2/2 found this helpful

Helpful Positive Review

Amazing Product; Thank You Stern Defense for R&D + Ingenuity by Tai, Verified Owner, October 16, 2019

This product is amazing! LRBHO functions well and it doesn't feel like something will break. If you own a P320 and want an AR 9, this is the product for you. No need to buy different magazines. This product truly adds to the P320 modularity; maybe no...
Read More...

1/1 found this helpful

Helpful Positive Review

Stern Defense M&P 9mm maxgwell adapter by Tim, November 30, 2021

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...

2/2 found this helpful

Helpful Positive Review

Nice piece by Kram, Verified Owner, December 28, 2024

Fits and works great. Money and time saver not having to buy and build a stripped lower.

1/1 found this helpful

Read All 16 Reviews

We've got an AWESOME deal for you!

See more Blazin' Deal items

Blazin' Deal

Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!

Color:: Black
Gun Model:: AR-15, M4, M16
Caliber:: 9mm Luger
Magazine Capacity:: 0 Round
Condition:: New
Additional Features:: 4140 NiB coated feed ramp., All gun components besides the Bolt and Barrel remain stock, Constructed from 6061 T6 aircraft grade aluminum., Ergonomic mag release., Hard coat anodized type 3., Sturdy Construction., Uses Glock 9mm Magazine, Works with all generations of M&P magazines., Works with any mil spec ar15 lower receiver.

Code: 3JS-CNC-S2D-001-SD-MAG-AD-9AND40-M-0RD

MPN: 001-SD MAG-AD-MP-9AND40-M

UPC: 850001176217

Blazin' Deal

List: ~~$263.00~~Save 29%

$186.99

Expert Advice Request for Quote Price Match

Compare

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.

Specifications for Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter:

Manufacturer:	Stern Defense
Color:	Black
Gun Model:	M16, M4, AR-15
Caliber:	9mm Luger
Magazine Capacity:	0 Round
Magazine Included:	No
Condition:	New
Additional Features:	Uses Glock 9mm Magazine, Hard coat anodized type 3., 4140 NiB coated feed ramp., Works with all generations of M&P magazines., All gun components besides the Bolt and Barrel remain stock, Works with any mil spec ar15 lower receiver., Ergonomic mag release., Sturdy Construction., Constructed from 6061 T6 aircraft grade aluminum.

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

Package Contents:

Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter

What firearm models does the manufacturer say Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter is compatible with?

The manufacturer suggests that Stern Defense MAG-ADMP9&40/P320 AR-15 M&P 9mm/.40 Magazine Conversion Adapter is compatible with AR-15, M4, M16

Compare