The man looked as if he might go for his gun any second.
He hadn't gone for his gun - I wouldn't have given him time.
The second young man did not even make an effort to go for his gun.
There would have been no time to consider going for his gun.
If you were half a man, you'd go for your gun.
A security guard at the door went for his gun.
I went for my gun before anything else could happen.
One of us can rush him while the other goes for his gun.
Then, at the word, each man goes for his gun.
He was trying to figure how to go for his gun and keep running full speed at the same time.