Re: A5 flush cup and stud question.
I have 1 stud up front for the bipod and then 2 flush mount cups for the sling, one front and one on the buttstock. You have to have the stud for the bipod and you could use studs for the sling also. I just like the looks of the flush cups when the sling is removed.
Make sure of the spacing for the front stud and flush cup because it can/will be different if you have a fixed or a swivel type bipod with PodLoc.