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Hi James and welcome. No Sir. This is for an AR-15 Rifle or Pistol. For the Sub 2000 that uses Glock magazines you would need this drum: https://www.budsgunshop.com/product_info.php/products_id/125119/promag+drma27+for+glock+compatible+9mm+luger+g17+19+30rd+black+drum

No, it will not fit as that is for an AR. The Drum you'll want is below. https://www.budsgunshop.com/product_info.php/products_id/125119/promag+drma27+for+glock+compatible+9mm+luger+g17+19+30rd+black+drum