I just had my local gunsmith from Tactical Armz(springfield mo) inlet my Choate Tactical from a factory DBM setup to the accumag setup. Cost me $40 and is perfect. Tomorrow I well get my action screws and well be set to throw some lead down my new build.
If you really need to to it yourself you will just need to take the raised part of the aluminum at the back of the mag well and just make it the same thickness as the front.http://img.tapatalk.com/d/14/02/17/aqy5uhe2.jpg