[kdogg]

I'm putting together a Daniel Defense URG based Systema PTW for a friend. I need a little bit of info and was hoping someone from AC might be able to help me.

I have taken a real steel Daniel Defense upper receiver and had it machined it to accommodate the Systema PTW cylinder and gearbox. I also have a real steel Daniel Defense barrel nut. This nut is used on any of the .223/5.56 Omega-X, Lite Rails or RIS II rails.

Now what I'm hoping to do here is use a Madbull Omega-X rail system to complete the project due to funding issues. Being that the rail clamps OVER the barrel nut, I need to know the outside dimensions of the Madbull barrel nut so I will know if the rail will fit.

I need to know the O.D. and how tall it is, front to back if that makes sense. I don't want to order the rail from Hong Kong, wait a month only to find out that it will not fit over the real steel barrel nut.

I've tried asking wholesalers and retailers whom I might consider buying it from and they seem clueless or unwilling to help.

I don't suppose any of you more tech savy guys who owns either a Madbull Omega-X, Lite Rail or RIS II can get me some measurements can you?

Thanks!