For IDPA, you'll need to avoid the ported barrel. (Although most clubs will let you shoot for an 'unofficial score' as a new shooter with irregular equipment.)
I would suggest bringing your Glock if that's what you shoot best. Much of IDPA is about weapon handling (draw, reloading, movement) rather than actual shooting, and the gun you're most comfortable with will allow you to focus on your gun handling skills without the distraction of remembering how to work your blaster.
Just my .002, of course.
Larry
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