A squirt gun (water pistol), as used to spray water for fun.
On major platforms, depicted as a green or orange toy gun with an orange tip and barrel pointed left. Google, Microsoft, and Facebook’s designs include mounted reservoirs.
Originally depicted as a classic handgun, as a revolver or other pistol. In 2016, Apple switched its design from weapon to toy; other major vendors followed suit by 2018. Deprecated emoji sets or smaller platforms still display the emoji as a handgun.
Microsoft initially displayed the emoji as a toy ray gun before switching to a revolver, then squirt gun. Google once featured a blunderbuss.
Pistol was approved as part of Unicode 6.0 in 2010 and added to Emoji 1.0 in 2015.