Help me ID thie ICD threaded barrel

[BrickHaus]

My buddy had 2 barrels in ICD thread he let me have if they fit in my Puma. Low and behold they both fit! Now I have a dye stainless, and this other linear barrel for my puma.. question is, what is this barrel? I thought it was a J&J right off thr bat, but the porting is slightly different. The back is relly different almost like an early CP, and the tip threads almost look like ion or spyder threads.

Any guesses?

[Outbreak]

It's just a stock ICD B2K barrel. They had numerous porting/tip designs over the years....