lelly, yes that's correct - 306 attys have a 510 threading, so they will fit the 510, or eGo. If you want a LR 306 atomizer definitely get the Cisco. I've heard tons of good things about 'em, over & over. LR 306 atty from Cisco is definitely a favourite for many vapers. And just as inked said above, on your eGo use it with a 306-compatible drip tip, & without the cone.