Hi Kenneth and welcome. No, this is for the HK VP9. For the Glock fed MPA Defender you would need this drum: -- budsgunshop.com/product_info.php/products_id/111590/promag+for+glock+compatible+9mm+luger+g17+19+50rd+black+drum ------------------- Cheers, stay safe and enjoy!

Hi Ken, no sir, this is for Glocks. You want this one for the Defender budsgunshop.com/product_info.php/products_id/111590/promag+for+glock+compatible+9mm+luger+g17+19+50rd+black+drum ,
Stay safe & have a great day!

budsgunshop.com/product_info.php/products_id/111590/promag+drma11+for+glock+compatible+9mm+luger+g17+19+50rd+black+drum

The MasterPiece Arms (MPA) Defender, a 9mm pistol, is designed to accept standard 9mm Glock style high-capacity magazines. This includes Glock 19 50-round drum magazines and other 9mm Glock-compatible magazines. The MPA Defender can also use 32-round ProMag magazines, just not this one.

The MPA defender uses Glock 17 magazines. This magazine below will fit
ProMag For Glock Compatible 9mm Luger G17, 19 50rd Black Drum