As they arrived all of the uniform looking people were separated into groups which were lead into the rooms of a large building on some fenced area. Jeff and Mark were lead into the same room. It was a barren room, all walls were white and backlit. Via radio a command came in "undress". They both dutifully undress and put their clothes into a neat pile where after a short moment a blue light engulfed them making them disappear into thin air.
Then they got another command, "attention", they quickly got into position and stood still. Suddenly a blue light appeared over Jeff. Gradually he shrunk more and more while his member got more and more erect and grew in length and thickness, with it's color changing to a metallic grey. The rest of his body changed shape, first becoming an undefined blog, but then a visual scope grip and trigger formed to match his member that was turning into a rifle. After what probably was just a couple of minutes there was a rifle where Jeff had been.
Mark gulped and picked up his former friend. Suddenly he noticed he could still establish a radio link to him, "Are you alright?", he asked, and the reply came back prompty, "Yeah, I think so, even though this still feels odd".
Then another "attention" command came, and Mark put back Jeff and stood still, wondering what fate awaited him.