Leslie, yes, the Panzer mags will work in the Emperor Cobra 12. The cobra 12 will take any AR12 style magazine. budsgunshop.com/search.php/type/ammo/caliber/10000533-12+gauge/maxp/400/q/panzer+12+gauge ....and here is an Emporer Cobra 12 magazine budsgunshop.com/product_info.php/products_id/715003431/emperor+arms+cobra+12+ga+10+round+magazine+new

Leslie, it sure will. The emperor cobra 12 ga semi auto takes ar12 magazines and mka 1919 drums. The pazner arms magazine will fit. Also here's a link to another 10 round magazine that will fit............... budsgunshop.com/product_info.php/products_id/98217/promag+mka01+mka+1919+12+gauge+10+rd+black+finish ...................... And here's a link to a 10 round one specifically made for the the Cobra 12..................... budsgunshop.com/product_info.php/products_id/715003431/emperor+arms+cobra+12+ga+10+round+magazine+new .................. Lastly if interested here's a link to a 20 round drum magazine that will also fit..................... budsgunshop.com/product_info.php/products_id/111608/promag+mkaa1+akdal+12+gauge+mka+1919+2.75+20rd+black+drum .................. Hope this helps.

Leslie, yes indeed they will fit and function with no issues!!
Also available are 15rd and 20rd Drums for even higher capacity : budsgunshop.com/product_info.php/products_id/714025798/promag+mka+1919+12ga+2.75+15rd+drum ------------------------------------------------- budsgunshop.com/product_info.php/products_id/111608/promag+mkaa1+akdal+12+gauge+mka+1919+2.75+20rd+black+drum

Leslie, yes Ma'am they will work no issue. Also there is a 15rd and 20rd Drum for even higher capacity : budsgunshop.com/product_info.php/products_id/714025798/promag+mka+1919+12ga+2.75+15rd+drum ------------------------------------------------- budsgunshop.com/product_info.php/products_id/111608/promag+mkaa1+akdal+12+gauge+mka+1919+2.75+20rd+black+drum ----------------------------- Cheers and stay safe!