Weapons are raised, to be comfortable (4)
I believe the answer is:
snug
'be comfortable' is the definition.
('snug' can be similar in meaning to 'comfortable')
'weapons are raised' is the wordplay.
'weapons' becomes 'guns' (gun is a kind of weapon).
'are raised' is a reversal indicator.
'guns' written backwards gives 'SNUG'.
'to' is the link.
(Other definitions for snug that I've seen before include "Cosy retreat" , "Comfy and cosy like bug in rug" , "joiner" , "Comfortable with guns" , "He joined" .)