Stern Defense Mag-AD9 AR-15 Magwell Adapter for 9mm/.40 S&W Sig P320/P250 001SDMAGADMP9AND40/P32

Product Description

The Stern Defense Mag-AD9 magazine adapter converts a standard mil-spec AR-15, M4, or M16 lower assembly to run 9mm and .40 S&W magazines, including compatible M&P and Sig P320/P250 magazines. Designed to install in seconds, the Mag-AD series features a last round hold open function for improved handling and convenience. Built from aircraft-grade aluminum with a durable black finish, it’s a practical upgrade for range use, training, and duty-oriented setups.

Product Highlights

• Converts mil-spec AR-15 / M4 / M16 lower to accept 9mm and .40 S&W magazines
• Compatible with M&P and Sig P320/P250 magazines for broad magazine options
• Last round hold open feature for enhanced functionality
• Installs in seconds for fast setup and easy removal
• Aircraft-grade aluminum construction with black finish for strength and durability

Specs

• Brand: Stern Defense
• Model/Series: Mag-AD9
• Caliber Compatibility: 9mm, .40 S&W
• Magazine Compatibility: M&P; Sig P320/P250
• Platform Compatibility: Standard mil-spec AR-15 / M4 / M16 lower assembly (5.56mm lower)
• Material: Aircraft-grade aluminum
• Color/Finish: Black
• Weight: 0.6000 lb
• Dimensions (L x W x H): 6.7000 x 4.4000 x 3.4000 in
• UPC: 850001176217
• Manufacturer Part Number: 001SDMAGADMP9AND40/P32

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