They staged a demonstration outside the DM Kineton arms depot on Saturday, protesting against the storage of weapons containing depleted uranium - which they say could lead to widespread radioactive contamination if there was a serious accident or terrorist attack.
Long Itchington resident Richard Williams was part of the 15-strong group, who called themselves the Warwickshire Weapons Inspectors. He said: "We succeeded in getting our message across, but we didn't have any joy in our attempts to get into the base itself.
"We want people to be aware of what is really going on here. These weapons could cause a major contamination of this densely-populated region if there was an accident. This could lead to mass evacuation, and the sealing-off of a large area of the Midlands for decades, even centuries - as has happened in Chernobyl.
"It sounds unbelievable, but that's because the debate has been very narrow, and anything from outside that perspective is very difficult to believe. We're not scaremongering - it's just that no-one will admit this could happen. We're met with a wall of silence from the authorities, so we seem like a bunch of crazy loonies."
And Mr Williams believes the base is assisting what he believes are crimes against humanity perpetrated by coalition forces in Iraq. He said: "The whole of that country has been heavily contaminated by massive use of these criminal munitions by the UK and US aggressors during their illegal invasion. Many US and British military personnel are also suffering from an upsurge of 'mystery illnesses', just as happened during the first assault on Iraq in 1991.
"Under the Geneva Convention and the Nuremburg Principles, to which Britain and the US are signatories, this constitutes a major crime against humanity, the most serious crime recognised by international law."
Responding to the claims, Ministry of Defence spokesman Charlie Morton said: "To compare DM Kineton with Chernobyl is a ludicrous suggestion. Depleted uranium is less radioactive than materials found in household smoke alarms. It's 40 per cent less radioactive than naturally-occuring uranium, which we are exposed to every day through water, food and air.
"There were 17 American soliders who had embedded depleted uranium shrapnel in their bodies after the 1991 Gulf War, and none has shown signs of health problems attributable to the uranium. And their offspring, a total of about 60 children, are perfectly healthy.
"The use of depleted uranium is not prohibited by any international agreement, including the Geneva Convention. The fact is that no other material is as effective at penetrating heavy armour. We have a duty to protect our troops by giving them the best equipment."