Gun metal VAMO from SmokTek.
Has the paper washer/liner/gasket for top end shorts, remembers wattage and has the upgraded spring which still doesn't seem to be enough as mine compresses easily after a few weeks of usage and I've found now the 18650 mode can turn off if I wiggle or set down too hard. I primarily run dual 18350 mode and seem to be able to get the end cap on all the way which may have compressed the spring more. I'll bee looking for a replacement or "hot spring" from AtlSmoke shortly.
Use mine with nipple top 650's and 350's and other than some issues noted above with the spring I've had no other issues. Vapes great and the finish, while a bit of hairline scratches, cleans up nice and is not fading (As per the guy in the other VAMO thread).
[Edit] Also just read further into the thread and mine, even being the Gun Metal version, has no V etched on the bottom or cap.
Cheers,
~Icky