Some more astronauts using Anvil and Stargrave bodies

 This figure uses the Anvil Industries Biohazard body and arms, an HK416 SOPMOD rifle and the Anvil Industries Spheroidal Helmet

This figure uses the body from the Stargrave Mercenaries II set and arms I think are from the Crew II set. Again an Anvil Spheroidal helmet ties them together. It does look a bit too big really, for the next one I might try drilling the neck hole out a bit.

Again, the air tank is the second one on the Crew sprue, it is smaller but suits the smaller stature of the figure.

Four of the astronauts together.