The most common and most likely answer to this crossword clue is the 8 letter word SIDEARMS
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More clues leading to the result SIDEARMS
Buddy explains!

The straight part
We know that "pistols" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pistols = sidearms.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SIDEARMS mean?
SIDEARMS noun- A personal weapon, such as a handgun or sword, carried on the hip in a belt, sheath, holster, etc for rapid access.
- To throw a ball with one's arm roughly parallel to the ground.