The most common and most likely answer to this crossword clue is the 4 letter word GUNS
I've seen this crossword clue in The Guardian
G
U
N
S
More clues leading to the result GUNS
Buddy explains!
The straight part
We know that "Arsenal may display these" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case arsenal may display these = guns.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 GUNS mean?
GUNS noun- A device for projecting a hard object very forcefully; a firearm or cannon.
- A device operated by a trigger and acting in a manner similar to a firearm.
- A long surfboard designed for surfing big waves (not the same as a longboard, a gun has a pointed nose and is generally a little narrower).
- A pattern that "fires" out other patterns.
- (metonym) A person who carries or uses a rifle, shotgun or handgun.
- (usually in the plural) The biceps.
- (in the plural) Violent blasts of wind.
- An expert.
- (with “down”) To shoot someone or something, usually with a firearm.
- To speed something up.
- To offer vigorous support to a person or cause.
- To seek to attack someone; to take aim at someone.
- To practice fowling or hunting small game; chiefly in participial form: to go gunning.
- To masturbate while observing and visible to a corrections officer.
- Well-developed muscles of the upper arm, especially the biceps and triceps.