Re-attaching sling/bipod studs on Boyds stock???

What I did on a couple of Boyd's stocks might also be useful for your case. I was not using a ML stock though. I didn't like how Boyd's attached the studs because to remove them one had to get a socket on the nut in the barrel channel to keep it from spinning when you unscrewed the stud. I refuse to remove my barreled action from the stock to take the sling studs out. To fix the nut spinning problem I selected the appropriate size drill bit (don't recall the exact size) and used it to make a counter bore for the nut to press fit into the stock. The nut fits tight in the counter bore hole. I used the sling studs to draw it down into the stock. After doing that I then used a cut-off disc on the Dremel to cut the extra threads off the stud that stuck out when it's threaded in the nut. The last step wasn't totally necessary but it makes for a little cleaner look. Perhaps a similar technique will work in your case.