Atif, the only difference is the color. The FDE model is flat dark earth. budsgunshop.com/product_info.php/products_id/147538/fn+herstal+66101275+five-seven+mrd+fde+fde+2x20 ....the other model is black. budsgunshop.com/product_info.php/products_id/147536/fn+herstal+five-seven+mrd+5.7x28mm

Atif, as others have stated they're identical except for color. The fn 5.7 mrd/ fde is flat dark earth color and the fn5.7 mrd is the standard black version. Hope this helps.

Atif, FDE = Flat Dark Earth Color and the standard model fn5.7 mrd is Black Color. They are identical except for the color. You can select the Color you like best. Cheers and stay safe! budsgunshop.com/product_info.php/products_id/147538/fn+herstal+66101275+five-seven+mrd+fde+fde+2x20 -------------------------------- budsgunshop.com/product_info.php/products_id/147536/fn+herstal+five-seven+mrd+5.7x28mm