Warhammer 40k Space Marines

Jimi tells me that these are Warhammer 40k Space Marine Salamander chapter, 3rd company, 1st tactical squad with custom, printed helmets and shoulder pads. He also tells me that he has more marines coming and will make the whole company with 120 marines plus vehicles. I believe him, but I also don’t understand any of what he said. All I see is cool army guys in green, heavy armor with big-ass guns and even one with a big-ass knife. They go pew-pew! at probably monsters or maybe other army guys.