Not much in my search on this on the footprint of these. I bought a 243 last year it is a remington 700 short action in a mcmillan a5 with an original seekins bottom metal that uses seekins mags not the aics magazines. Due to lack of availability of anything over 5 rounds and even finding more of those from seekins I was trying to figure out how close the inlet is or if I can have a competent smith swap dbm's in my current mcmillan a5 from seekins to surgeon or badger without having it look bad or not fit properly.