Mod Zero is coming out with an interesting concept. It is an adjustable picatinny rail system that you put on your rifles. You zero your optic of choice then swap the optic to another rifle with the Mod Zero rail system. Of course the optic will not have the same zero as the previous rifle setup. But you can adjust the Mod Zero. You zero the rail and then you can swap the optic across multiple guns that have the Mod Zero rail.
They are just starting a crowd funding campaign as well as looking for beta testers.
No word on price or when they will be released.
For more information, check them out here.