John, yes sir, this will accept AR12 style magazines and mka 1919 style magazines and drums. If interested here's a link to a 10 round magazine........................ budsgunshop.com/product_info.php/products_id/127318/sds+imports+t10rdm+replacement+magazine+12+gauge+sds+imports+10rd+black+detachable ........................ Here's a link to a 15 round drum that will also fit.............................. budsgunshop.com/product_info.php/products_id/714025798/promag+mka+1919+12ga+2.75+15rd+drum ............................. From what I read the 20 round drum can be awkward to use because of the design of the shotgun but here's a link to a 20 round drum that will fit........................... budsgunshop.com/product_info.php/products_id/111608/promag+mkaa1+akdal+12+gauge+mka+1919+2.75+20rd+black+drum ................. ...... Hope this helps.

Hi John and welcome. The Bullpup design is best served with the 10rd Magazine and the 15rd Drum : budsgunshop.com/product_info.php/products_id/127318/sds+imports+t10rdm+replacement+magazine+12+gauge+sds+imports+10rd+black+detachable ------------------------------------------------- budsgunshop.com/product_info.php/products_id/714025798/promag+mka+1919+12ga+2.75+15rd+drum - Cheers and stay safe!

Here's a nice 20 rounder for ya'!
budsgunshop.com/product_info.php/products_id/111608/promag+mkaa1+akdal+12+gauge+mka+1919+2.75+20rd+black+drum

John, 10rd magazine here budsgunshop.com/product_info.php/products_id/127318/sds+imports+t10rdm+replacement+magazine+12+gauge+sds+imports+10rd+black+detachable ,
Stay safe & have a great day!