I have had this marker for several months now and I have done some research but I still am not 100% sure what barrel my carter comp uses. I have compared the threads to the pictures on Doc's barrel guide and to me it looks like the prerelease impulse threads, but I couldnt find anything about a carter marker using impulse threaded barrels. Since I dont have a shocker barrel to cut down I wanted to check your opinions here before I picked one up for it.
Here is the barrel:
Here is the pre impulse barrel picture on Docs website:
And here is a picture of the complete marker:
Thanks for any help/confirmation anyone can provide