The bots defending the area are, unquestionably, designed for security; they're heavily armed and armored, with small weak points protected by a thick, plexiglass-like substance. He was being escorted by the much lighter snipers, which, in many ways, resemble shadow stalkers, carrying many of the same armaments and accessories. Once they reached the more secure floors, however, another pair of the snipers join them, surrounding him on all four corners, and continuing to lead him deeper into the facility; if he attempts to separate from the group, they inform him that he needs to continue with them, as he is requested in the labs, below.