Hi Submariner,
That is a good question !
First of all you have to be sure of correct eye relief - always. An option here may be a butt stock extension to move the saddle of the scope away from the magazine. If you know what I mean.
Maybe you need higher mounts to stay clear of the magazine. Not the best option - but you may have to do this.
But if you can manage the 2 options you have giving yourself and donīt have any problems with the eye relief issue then choose one of them.
Rgds,
Thunderbolt A-10