In the OP, you listed a 15" handguard. Are you planning on 16"+ barrel? I think most compete with a shorty PCC in USPSA for better maneuverability.
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I still like Troy stuff, their head of marketing is an awesome lady and I'm actually in their promo stuff for the xm177/gau5. Bob the president of faxon is a good guy and I would run his 9mm barrel. He makes great barrels for the money. I'm guessing this is a PCC competition gun either 3gun or uspsa?