Michael Hogg, 33, and Andrew Wood, 28, were strolling past a home in Hartlepool, Teeside in August this year when they spotted the "stash" on a window sill.
Teeside Crown Court heard how Hogg smashed the window, while Wood kept a lookout. They must have been very disappointed to discovered it wasn't real!
They were soon arrested after a neighbour saw them and rang the police.
And the dozy duo were both sentenced to three years in prison after admitting the offence.
It just shows, crime doesn't pay...
Defendant Matthew Collins was quoted in the Daily Star describing the incident as down to "stupidity".
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