So you have an SFAR and it jams on you?SCARS would work ..... Rugers would jam.
Again, what manufacturers and what years were they built?Mostly older Hi Quality Rifles / Scatterguns / Handguns.......
When CNC machining did not rule the day.
This is really a bad example. Americans do not care enough about their food. Champagne only comes from Champagne France. Parmesan cheese only comes from Parma Italy (and couple of nearby areas) something from anywhere else is something else. A Daniel Defense upper only comes from DD, you can get an upper from others but they are not a DD upper.It was a thing a while back. Some region where champagne originated from and named the same, tried to sue everyone for calling their sparkling wine Champagne. The big quote for their case was "it can't be called champagne unless it comes from the champagne region". Like European wine drinkers needed to provided more evidence of their wine snobbery. :-)
Jeep also sued Roxor. I posted about it back a while.Not that they looked similar- that the Jeep slotted grill was trademarked.