The phrase "armour off" is correct and usable in written English.
It can be used in contexts where someone is metaphorically or literally removing their protective barriers or defenses.
Example: "After a long day of work, I finally felt comfortable enough to take my armour off and relax at home."
Alternatives: "defenses down" or "guard down".
Although they are clearly this year's action-figures-in-waiting, these somewhat gormless looking mechanical mercenaries are difficult to look at when the armour comes off.
As the infantry and armour moved off their start-lines, the barrage slowly crept forward, concentrating its fire on positions in front of the Anglo-Canadian troops; four battalions and two armoured regiments advancing on a two brigade front.
But, according to critics, the child care issue takes more lustre off the armour of the knight once almost universally supported in the battle against high technology's evil empire — Microsoft.
Lady Percy, who has just zipped her fumbling war-hero husband into his armour, sings him off to his death with Glasvegas's Daddy's Gone.
Daniel's brother Simon claims partial credit for the Clangers, having chatted to his father about his fantasy of a small planet and a giant called Jeffrey who wore armour to ward off meteorites and drank soup from craters.
In July 2010, Byron Williams loaded his car in Northern California with a small arsenal, donned body armour, and set off for San Francisco, intending to massacre people at two of Beck's regular targets, the Tides Foundation and the American Civil Liberties Union.
In both cases, the soldiers were shot when they didn't even think they were in danger — the Americans were filling out paperwork in their own country, the British were at ease, as the Times of London described it: Relaxing after their patrol, with their armour and helmets off, the troops were drinking tea only a few metres from their killer, a man they had been risking their lives to train.
The ends of the belt armour were closed off by bulkheads that ranged in thickness from 203-102 mm.
Weight affects speed and endurance, creating a trade-off: armour added protection, but added weight reduces maximum speed.
It's even Samus from Metroid taking off her armour, relying for her shock value on the assumption that the person watching is male.
