I have a few grips in my parts drawer that I am thinking of putting on my seekins lower for my 50BMG upper but I cant decide on which one. Do you guys think i would like the angle of the Magpul MOE or the MOE + I have both also have an umbrella corporation grip that is more vertical than both of those rifle will be shot from a bench or prone most of the time . I have noticed that a lot of precision rifle chassis have a near vertical grip why is that?