What is the same between all blowback firearms? Extraction.
It would be one thing if we were talking about some other aspect of firearm operation aside from extraction, but primary extraction is the #1 thing that makes all blowback firearms the same. So you are making a distinction without a point.I did, because it was reasonable in context. If you don't understand that blowback extraction is all the same, you won't understand why it is reasonable to compare a Beretta 950 and an MP5.Nobody ever refers to the roller delayed blowback using only the word "blowback."