Not being real familiar with those high dollar handguns, I had to look at the pictures and descriptions on the STI web site.

It looks like the STI Tactical may not be IDPA legal because of the full-length dust cover. The following quote is from the IDPA rule book, pg. 21 for ESP and pg. 23 for CDP.

"EXCLUDED Modifications (NON-Inclusive list):
1. Full length dust covers of carbon or stainless steel."

--Lin