Help needed finding a grip

[duanehunter1]

I have a XLR chassis that uses AR grips. My hand is in an uncomfortable position shooting prone. I recently seen a post on here about a more vertical grip that has a thumb shelf and more importantly spaces the trigger finger out forcing you to use the pad of your trigger finger. I am trying to find this grip. Any help would be appreciated.

 

[eric32]

MPA vertical grip but you have to mod the grip to fit on your XLR

 

[duanehunter1]

MPA vertical grip but you have to mod the grip to fit on your XLR

Thank you very much, that is exactly the one I was looking for. What has to be modified?

 

[eric32]

pm your email address and ill send pics