① http://www.unicode.org/charts/PDF/U1F300.pdf#14
② http://www.beretta.com/en/m9/ and https://en.wikipedia.org/wiki/Beretta_M9
If a hospital has a rule against taking guns on premises, nobody thinks that would apply to a toy gun. A toy gun is a different semantic object.
http://emojipedia.org/microsoft/windows-10/pistol/
Additionally, your pointing out that the example glyph looks like a beretta only has any kind of weight if you can also point to guidance that specifies to what level it should be followed.
I.e., Windows used to show a laser/toy gun, but they changed this almost a week ago in the Windows 10 Anniversary Update: http://blog.emojipedia.org/diverse-emoji-families-come-to-wi...
A Microsoft spokesperson said “Our intent with every glyph is to align with the global Unicode standard, and the previous design did not map to industry designs or our customers' expectations of the emoji definition.” (https://www.engadget.com/2016/08/04/microsoft-new-real-gun-e...)