We shot my son's friends new PC9 with my CAC9 screwed onto it. It was quite with our 147 grain loads and had a crack as excepted with factory 124's .
We then tried my Powder springs 380 can on it. Same with both. No hitches in 100 rounds.
I would buy one but have a SBR in a Marlin Camp 9 and plenty of mags.
My son is picking up his PC9 this week as he has a G17 and many mags. He plans also to SBR the gun on a F1.