Review: Hellcat Pro 4.4" Threaded Barrel Kit

The article left out the change in fps when comparing the original barrel vs the longer barrel. Can you tell me what the avg difference was?
Also and pics with the compensator installed?

Thanks for a great article.
I too put a threaded barrel on my Hellcat Pro and equipped it with a small compensator. I find my shooting a little more accurate and consistent with the setup. My groups are now 1 inch at 15 yards shooting from a standing position. Which for me, is pretty good shooting.
Hi all !
Anyone knows if the Compensator on the Hellcat RDP will be available as a standalone option ?
I'm planning to get a HellcatPro TB and would like to add the original Compensator.
Thanks for all answers. (y)