This is an incredibly bad idea. Not only could people could easily it for a gun-like weapon, but an AR-15 lower is legally a firearm. I doubt the cops would be very happy about it being waved around in a public space.
Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.