17-A 210 involves the communication of a threat. If you don't threaten someone with the firearm, you're not in violation of that statute
17-A 211 involves recklessly causing a serious risk of bodily injury to someone else. There is no risk of bodily injury to anyone with a holstered handgun. If that handgun ever becomes unholstered, then a reckless conduct charge "may" be warranted, but again you have to prove that the risk was caused recklessly, not purposefully.