Following a search of SAS sniper Sgt Danny Nightingale's accommodation and the discovery of the arsenal, he and Soldier N were both summoned to see a superior officer, a court heard.
Timothy Cray prosecuting said: "Soldier N then told the defendant that he had a pistol in his room and ammunition at the property.
"The defendant then said words to the effect 'I've got exactly the same at the house'."
Soldier N later pleaded guilty to Firearms Act offences after a weapon, ammunition and hand grenade were recovered from the property.
He was given a sentence of military detention, which he is serving.
More top news
It is much more plausible that Hammond rather than Johnson would end up resigning after May reveals more about the kind of Brexit she wants.
A woman has been arrested at Heathrow Airport on suspicion of a terrorism offence after arriving on a flight from Turkey.
Social workers across England have blown the whistle on a "threadbare" care system.