If it's a common modification made for ergonomic reasons that doesn't impact the safety or function of the pistol then it would be a real stretch to try to twist that into something that would cast the owner in a bad light.I would think that type of reasoning would also include any type of combat grips.
There's also the risk of getting sued by Marvel comics for trademark infringement...
Like so many things in life there's not a clear answer. So people will have to make a decision based on their assessment of:
1. The odds that the grips will be an issue. (Small)
2. The potential negative outcome if the grips do actually become an issue. (Significant)
3. The positive effect of having the grips on the gun. (Personal preference satisfied)
There's also the risk of getting sued by Marvel comics for trademark infringement...
BUT --AirForceShooter said:...if you are prosecuted, anything will be used against you....
The other issue is do you want your nice, fancy grips to be thrown into an evidence locker for the next three years where they will rot and rust until the court case is over with? That's why you should never use some high dollar custom gun as a SD or HD piece. Get something cheap and straight to the point that you wouldn't mind giving away for a very long time.