In StockSave 10%
Stern Defense AR-15 Mag Well Adapter for M&P 9mm/40S&W, Black- MAG-ADMP9&40
Sold byPalmetto State Armory•Posted May 18, 2026
Compare prices for Stern Defense AR-15 Magwell Adapter for S&W M&P, Sig P320 9mm Magazines Black$187.99
$208.99
You save $21.00 (10% off)
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Deal Summary
- Currently in stock.
- Caliber: 9mm
- Category: parts
- UPC: 850001176217
- SKU: 5165490971
- Brand: Stern Defense
Price History
Deal Details
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 calib
Other Offers for This Product
Active offers from your catalog for Stern Defense AR-15 Magwell Adapter for S&W M&P, Sig P320 9mm Magazines Black.
Comparing 4 retailers carrying this product
Lowest Price: $148.20
Highest Price: $187.99
You Save: $39.79
Avg Discount: 8% off
STERN DEF. MAGAZINE ADAPTER AD9 S&W M&P/SIG P320 9/40 MAGS
Stern DefenseBattleHawk ArmorySKU/UPC: 850001176217
$148.20$186.99Save 21%
View at BattleHawk Armory
Ar-15 9mm Conversion Adapter - Ar-15 9mm Conversion Adapter For S&W M&P/Sig 320 Magazines
Stern DefenseBrownellsSKU/UPC: 100033498
$186.99
View at Brownells
Stern Defense AR-15 Magwell Adapter for S&W M&P, Sig P320 9mm Magazines Black
Stern DefenseMidwayUSASKU/UPC: 627795
$186.99
View at MidwayUSAStern Defense AR-15 Mag Well Adapter for M&P 9mm/40S&W, Black- MAG-ADMP9&40
Stern DefensePalmetto State ArmorySKU/UPC: 5165490971
$187.99$208.99Save 10%
View at Palmetto State Armory