I think it is hype to generate market - not a bad idea, but I don't find it convincing.
Having softer recoil is a consideration. But I found that just cycling the action on an MP5 is not trivial. They mention that it is harder on their Scorpion upper - not a feature I would enjoy. I can double tap very well as the weapon exists out to 25m on a steel plater barely larger than a chest plate. Not sure I would 'need' this feature.
You have to weigh this with your ability to clear the weapon if need be. And again, I don't mind using it as it comes to the military for a handful of countries now.
I'll keep watching my FPB and surrounding area. I MAY pick up a few FPBs.
I have more than one Scorpion and all mine have been beveled at the factory. I MAY decide to clean them p a bit.
I don't see ANY evidence that anyone has had so much steel deformation that it traps the FPB in the UP position that has resulted in an OOBD - unless someone shows me - it doesn't exist.
If you change the bolt to a HARDER material and it dents the hammer bad enough I could see a problem in the OTHER direction.
CAN ONE change the spring and ball bearing OUT when they wear?