Yep! this'n here lufs the 401 atom's!! through the months i have gone in many direction's with the 401 atom. infact it's the only atomizer i've used since i started E-smok'n 5/27/09. It did'nt take long before i cut the top off the cart!!,and started drip'n into the stove pipe,onto the atomizer. Only now i screw the atom onto a 510 adapter and the screw the adapter onto the SilverBullet,this is how E-smok'n is ment to be.Treat yourself and give it a try!!! you'll be glad you did!!!