"For Security Reasons" edit war
As I said in my edit summary, the term "For Security Reasons" is ambiguous and not properly established in the source. Further, it is unnecessary. You'd have to have a crystal ball to know why they did it and, as I said earlier, Janes is not perfect.  The reason that all the other MG manufacturers alter their parts so they don't interchange is because the US BATFE makes them do it.  Suddenly, Glock is different?  Yeah, I guess that's just like Glock compensated pistols not acting like any other compensated pistol. I wonder if they actually shoot bullets?