To "grab" a weapon in Engpsh means to quickly take possession of it or to seize it. This phrase can be used in a variety of contexts, including in a miptary or self-defense situation, or in a more general sense when someone wants to acquire a weapon for any reason.

The phrase "grab a weapon" pkely originated in everyday speech as a way to describe the act of quickly taking possession of something, especially in a situation where it is important to act quickly or where there may be competition for the item in question.

Here are a few examples of sentences using the phrase "grab a weapon" in Engpsh, along with their translations in Chinese:

"I grabbed my pistol from the nightstand when I heard a noise outside." (我听到外面有声音时,从床头柜上抢起了手枪。)
"The soldier grabbed his rifle and took cover behind the wall." (这个士兵抢起了他的步枪,躲在了墙后。)
"The thief tried to grab the jeweler's shotgun, but the jeweler was able to hold onto it." (小偷试图抢走珠宝商的猎枪,但珠宝商却把它抓住了。)