G28 Magazine
The G28 E2 (Standard) can't use 20rnd Magazines.
While the Patrol Version can use the 20rnd Magazine, the DMR/Standard Version can't use the standard issue 20rnd Magazine which is the Magazine issued by the german Army.
(Just to make it clear, I'm not expecting to remodel the rifle, just a config change to make it possible to use the 20rnd Mag for Arma MilSim)
Examples:
http://www.heckler-koch.com/de/produkte/militaer/praezisionsgewehre/g28/g28/produktbeschreibung.html
http://www.deutschesheer.de/portal/a/heer/start/technik/handwaffen/gewehrg28