You get 24 Bolter Marines, 10 Assault Marines, and 6 Heavy weapon marines. No sergeants, captains, terminators, or anything really interesting. With the 4 sprues that makes 96 Bolters, 40 Assault Marines, and 24 Heavy Weapons. The assault marines for up into 8 stands of 5 marines which forms 2 formations of 4 stands each. Now the heavy and bolter marines have more flexability. Now 1 heavy and 4 bolters on a stand would match the tactical stand description and allow you to form 4 units of 6 stands but Epic is not as much WYSIWYG game as 40K. Devastators have 2 heavys per stand so you can make 12 devastator stands for 3 formations of 4 stands then 2 formations of tactical squads that have no heavy weapon models but still get to have a heavy weapon in the rules. This just makes it very clear what a tactical and devastator stand is.
For my beakies I used 1 heavy per devastator and none on tactical but I was try to stretch the heavies between 2 armies and now I have 24 more so I can add more if I want to.
Here is the close up of the 3 different models on the sprue.