Originally Posted by Styrak
That's a strangely high FPS for a propane mag in a KJ M9.
Not sure got it from anderson and anderson way back in the day. Its a full metal vertec m9 if that makes a difference it was closer to 400 when i first tested it but with the hop all the way on its lower obviously.
Ya i see most of the new ones are like 320ish they say "new version"