I have 2 Grand Power pistols. A K100 and an x-calibur. The x-cal is illegal because of its barrel. It’s clearly a cone but weight wise it’s hardly a heavy barrel. It comes in at 4.79oz and the k100 is right around 1 oz less at 3.74oz. The x-cal barrel is also 0.6” longer so it’s going to be heavier. I’d suspect if there was a 5” k100 barrel it would be similarly weighted. But the shape disqualifies my favorite pistol.
Im not sure because I don’t own a x5 but I’d venture to guess the barrel is probably 1oz heavier than a regular P320 barrel that’s around 0.3” shorter.
It certainly makes me lean towards shooting IPSC (USPSA) over IDPA.