You need to have it made from a Surefire Trainer. BSD does good work. Price starts to get up there when you start with a trainer and then pay for the cutting and threading. I know some who have done it with a Warden, but there is not enough material, in my opinion to make a safe and durable mount. Others might disagree, but it is not a liability I am comfortable assuming. DM me, we have something in the works, but a few months out.