dont get any informations about the rifle and I think its the original Mannlicher clip loading magazin. the gunmaker would have close the opening under the magazin where the empty clip fall out if it wasn't needed anymore.
my guess is that you have to remove the scope for loading the clip here. this is easy and quick because most of the M 95 or M 88 sporting rifles have a claw mount. this one here looks like a contra claw mount but it works equal. 5 rounds are enough for most hunting situations and for driven hunts they have shoot over iron sights.