TSA isn't going to let you anywhere near the gate with that.  They don't care about deactivated.  Looks real/it's real as far as they are concerned.


Since someone complained about a lack of sources:

https://www.tsa.gov/traveler-information/firearms-and-ammunition

Realistic replicas of firearms:  No.


Edit:  They've changed the page.  Now it says:

Replica firearms, including firearm replicas that are toys, may be transported in checked baggage only.