Originally Posted by Spider Pig
You can't just swap out the bottom plate from ADL to BDL. It's a full magazine conversion that requires milling. How much depends on how good your gunsmith is and what conversion you go with. It's not going to be cheap either.
Take your time and find someone good. You don't want someone dicking up your new stock with shoddy mill work.
I thought to go to bdl, you just have to buy the Adl to Bdl conversion kit, that has the trigger guard, magazine, magazine follower, spring and spacer.
But to do DM or Mag fed, you have to mill the inner lips in the receiver from the factory mag box.
I was under the assumption that this lip only needs to be milled if going to DM, but not BDL.