Mr Sharpe said he had left his garage door unlocked at times on Monday and Tuesday because he was home.
It appeared the guns had been taken while he was at the house, he said.
While it was most likely the guns would be sold, there was a possibility they could be involved in something far more serious, he said.
"When it's something like this, it makes me think of the possible repercussions."
Mr Sharpe said he feared for anyone who was seen by police with the replicas and was shot at as a result.
"I wouldn't even want that to happen to the person who took them.
"I just don't want anyone to get hurt."
Police have voiced concerns about the motivation behind the burglary and have warned the assailant not to take the replicas out in public.
They were also concerned the burglar might cause alarm and distress following the shooting threat made against the University of Otago last week.