Yes , I have a polarstar stock (with adapter) for the 13ci tank setup using a UGS. I don't have a regulator or tank b/c I was happy with the 12g setup. I have not gone into HPA anymore than the Kythera at the present time.
What measurements do you need?
Basically every dimension in front of the buffer tube threads (for both designs if possible). Trying to get the air tube section to fit through the rear of the stock. And on the type 1 (the one mean for milspec receivers) how does the air line attach? Is it just a press in or does it lock in there somehow?I've got just the UGS reg, with both the TM and AR adapters.
What do you need?
I'd greatly appreciate it if you wanted to let me borrow the stock for a bit. I think the wolverine stock uses a very similar system so should work for both. I'm probably going to have a permanent fitting in the stock that fits inside those extension tubes on the stock, then have a regular nipple on the other end. That way you wont need to worry about keeping tension on the air line to hold it in place.I’ve had type 1 and type 2, it’s basically the length of the nipple or face that the air line sits in. The main issue will be making sure the line stays in place. I honestly hate the design of the cgs/ugs regs. The line sits in them with 2 o rings. No fitting, no qd collar. It sits in the reg and is held there by the pressure of the line from the engine. Not air pressure, the tension of the line. So the line has to be the proper length to work. What I did was make a block or collar to sit against the base of the fitting into the cgs/ugs reg. Then it stays in place when you thread the buffer to x depth. I could send you my UGS stock to play around with, I won’t be needing it until I have your stock or an MDT anyways.