After Devoy was finally subdued and taken from the house, the Army bomb squad carried out a controlled explosion on the hand grenade.
At the time he was being targeted by a number of gangland enemies who wanted him dead.
He was warned by gardai of four separate death threats and survived a hit in August which resulted in an horrific double murder.
The assassin ended up killing his innocent sister Antoinette Corbally-Devoy, a 48-year-old mother of six, and his friend Clinton Shannon (30), who also had no involvement in crime.
Those murders have not yet been solved.
It was heard at his trial that Bottler is the only surviving child of four, following the death in prison of his older brother John, the 2014 murder of his brother Michael and the 2017 murder of his sister Antoinette.
The Sunday World previously revealed how it is believed the Kinahan cartel told him Hutch associates were behind his sister’s killing to get him to organise attacks.
After pleading guilty in the Special Criminal Court last year, Devoy apologised to the gardai and neighbours for his terrifying rampage.