We don't have synonyms for present arms yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pesent arms, presents arms and presented arms.
(n) :
(military) A position of salute in the manual of arms in which the gun is held in both hands vertically in front of the body, with the muzzle upward and the trigger side forward.
(n) :
(military) A position of salute in the manual of arms in which the gun is held in both hands vertically in front of the body, with the muzzle upward and the trigger side forward.