A tad confused by the wording, though nice job adding anything to the thread Taggerung (because being an ass is so much nicer than actually trying to help), but if I'm guessing right then:
The entry says they have a bolter, bolt pistol, and close combat weapon so you may model any members of that squad as you see fit with any combination of the three. Each model counts as having all three things unless you buy an upgrade that would otherwise replace something. (Like taking a meltagun for the squad, which might require one of the models to give up his bolter for the meltagun.)
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