It is, I've had mine for over an year now as sort of a test semple. Unfortunately their factory burned down just as the first run was ready to ship internationally (to redwolf, gunfire etc.). So only 20 or so guns that were distributed locally survived from the first batch. They have since moved to a new location and started getting new machinery to restart production. (And it does indeed stop on empty with regular midcaps) Also shown in the picture is the new version of their midcaps which I received yesterday and haven't been able to test yet.