eq binds aggressively to the androgen receptor. i think the AR mediated steroids are class I, but that doesn't matter. just know that it works at the AR. stack it with something that works outside the AR like winny, dbol, drol, anavar, halo, depending on your goals.
if you're not going to get more EQ then go with the 6 wk version. you may not see anything until week 4, but it should last 2-3 weeks after your last injection.