Will be calling to send to springfield today then. I am in absolute agreement with you. I have disassembled many, many guns. Have never run into this and giving SPA the benefit of the doubt. But at this point, sounds like something happend to my pdw in manufacturing that is not allowing the hate brake to be removed.People I told you, there is no magic to this. Righty tighty lefty loosey. 3/8 extension in the front, use a short extension so the extension does not twist Under the torque. The PDW uses the same 1/2 28 threads any milspec barre has. Propane torch to heat the inner part of the break if needed. The Inner part is what actually screws onto the barrel. The inner part pushes the outer part into the shoulder of the barrel. You would use the same exact techniques one the hate break that you would use on a stubborn barrel nut.
Also Maxim warns against suppressor use on the PDX, the PDX and PDW use the same technology.
FYI - Maxim did get back to me and mentioned ONLY using a reaction rod and a 3/8 socket wrench. No tricks.
Suppressing MDX - They actually do support and warranty ONE suppressor. The QD Helios.