There is no caliber limit...
You need to order an "undesignated" action. You can get them from Savage, but I believe Northlander had some at one time as well. Dont know if he still does or not, but sure he could get one.
Put a muzzlebrake on it too.
You could keep an eye out for a Striker being sold, and use that action for your build. I'd check Gunbroker to see if anything pops up.
Bookmarks