add physic simulation to object when drop

Hello, guys.
Can you help me with the issue: I have some guns in the scene, i can take it, and can drop out.
But when drop them, it looks unnaturally, it simply appear in some location that I have set (2 meters in front of the player).
But how to add some physic to guns, when I drop it? I tried to add “simulate physics” but it dont help.