Instead of buying multiple dedicated lowers per caliber.
Stern Defense has created a novel approach to converting ones AR-15 lower receiver to shoot shorter cartridges out of a larger mag-welled lower receiver.
The MAG-AD9 and MAG-ADMP9&40 magazine well adapters slide into your magazine well of your AR15.
The two different style adapters are compatible for GLOCK magazines and the other is for S&W M&p magazines. 9mm and 40sw specific.
These also feature a last round bolt lock back.
MSRP starting at $179.99
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