The Securetech Skinshield is apparently a sort of full body, programmable, body suit, based on the fluff. However the only note after the stat block is:
Notes: Includes Concealable holster, RACS 2 (see p. 259, SR6)
Of course, when I go look at page 259 of the 6e CRB, it has a page of missile launchers and weapon accessories, with no mention of "RACS". And in doing a search of the PDF, there is no hit on "RACS".
Anyone have a clue as to what they were trying to link?