Trying again as I am not home to measure it myself.

Can anyone tell me what the thread pitch (size) is on the fake suppressor that threads into the  front site base on the GSG5 is?  Trying to source a 3 lug adaptor for when I finally SBR my rifle.  I'd even settle for a ProMag adapter since I have no intention of suppressing it...just want that 3 lug look.  Since these all seem to be out of production, I'm going to have some made.  Talking to a machinist right now, but he wants to know if the thread is common, or custom ( I really can't imagine custom), but I'm not home for the next few weeks I was hoping some kind soul could pass on that information to me.

Thanks,

KA

ProMag dimensions from azshooterssupply.com:

Mfg: Pro Mag SPECS: Steel, phosphate coated, black. 2" (5.1cm) long, 7/8" (2.2cm) diameter. 1.4 oz. (39g) weight. Front Threads: 1/2"-28 tpi male. Rear Threads: 5/8"-24 tpi male.

ProMag GSG-5P Three Lug Threaded Adapter

As mentioned by someone else in the other thread, I also sent an email to CW Accessories asking if they would start making the adapter.  No reply yet.

Man, I looked all over for that.  Thank you.

You're welcome. Maybe someone that has an adapter can provide the internal dimensions.