Just picked up a P320 Spectre Comp Blackout.
I'll be shooting IDPA in the Carry Optics division.
Size limit on height is 6.00" with an empty magazine inserted. With the 21 rd. magazine it it over the limit by about 1/4" or so. Sig makes the 17 rd. P320 magazines, but I'm just trying to verify that the Spectre Comp takes standard P320 magazines and not something special.
Thanks in advance for any help.

It should but if you're going to keep the magwell on it you will need to get some aluminum or brass base pads for them. Like on the magazines that come with the Legion models.



P320 X-FIVE LEGION 17RD MAGAZINE

^^^^
What Paten said.

I have a few of the Legion mags but they are kinda pricy. I got several of the standard Armscor 17r ACT mags from our vendor Greg Cote and then also purchased the same number of base plates from the Henning group.

So for about $43.00 per I have mags that work with the mag wells for both my AXG Pro and X5 Legion.