I will just add to the subject, with some notes.
- removable magazines are not for DG rifle, Removable magazines can be lost in worst moment.
-Hinged plate magazines could be acceptable, but must be verified as fool proof, absolutely reliable. (or additionally secured with duct tape)
- closed bridge over the action, which eliminates option to load the rifle from top, directly to magazine. It implies removable magazine, liability for DG rifle. no no
- Set trigger option is not necessity, for me, set trigger is more liability on DG rifle then the advantage. I just want simple moderate trigger pull.
- quick detached type of mount is must, accompanied with iron sights. Best QD are in my opinion German swing mounts and German claw mount type. Steel
- High quality recoil pad, to compensate the recoil.
- Safety must be operated by thumb. (safeties operated by index finger, around trigger guard, are not for DG rifle, as in critical moment, to switch safety to off, critical time is lost, before index finger is back on trigger.
Action: controlled round feed, push feed, straight pull, probably subject to personal preference. History, and industry practice are inclined to CRF, but other types have not been historically so much present as CRF.