I'm interested in the HS EPS full-size 6 moa green dot optic for a .40 M&P 2.0 carry.

I understand this full size optic uses the 507K mount pattern.

-I was looking at Primary Machine to do the work. The verbiage makes it seem like the rear sight dovetail is not touched. The picture suggests otherwise. Is it left alone if I choose "mount optic in front of rear sight"?

-This appears to result in a direct, plate-less mount, fitted to my optic. (Have to send in optic) Does it?

-If the above is true, will i be able to see the factory sights a little?

-It seems like this puts the optic close to the ejection port. I saw one review where it may have caused an issue with ejection, but more likely I think that guy was using a weak 9x19 load.

-I've been shooting with 2 moa red dots only on handguns. I think the 6 moa green sounds great but haven't looked through one yet. What do you think about them?

- Do you reccomend a different buisness to do the work?