A proudly American company, Stern Defense manufactures their products with top quality materials supplied in the United States. Stern defense is a speciality manufacturer that is committed to precision and efficiency with the weapon accessories they produce. The Stern Defense Mag Adaptors for the AR-15 remain an MSR Arms favorite.
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Sale!Best SellerWith the Stern Defense Mag-AD9 adapter, you can easily convert your AR-15 into an AR-9. Unlike other 9mm adapters, the Mag-AD9 is made from lightweight 6061 T6 aircraft grade aluminum which means it’s built for longevity and reliability. With premium features like last round bolt hold open (LRBHO) and an easy to reach mag release, the Stern Defense Mag-AD9 is the only choice for an AR9 conversion!