they are the same gun I suspect that 320XF9VTAC is a older model number (it is not listed on the sig site )
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Anonymous
Answered
Cal, the VTAC also has X Series lineage regarding the modular design for "Caliber" change capability. I see no real difference between the two so I would see if Sig Customer Service can enlighten on the actual difference at 603-610-3000 option 1 Monday-Fr
