The Kalamunda resident also broke the Sub-Masters records for the squat, bench and deadlift categories.
McNaught’s records display impressive strength with a squat of 250kg, bench of 185kg and a deadlift of 280kg.
The father of two said despite cracking the world record, he was disappointed with his final results.
‘I was slightly disappointed in myself because I wasn’t able to equal or better my results from the State Championships held five weeks earlier,’ he said.
‘It was still enough to take out the world record, but there wasn’t enough resting time for me to gain my full strength.
‘However, I am still new at all of this and I am learning about my body and it’s a great feeling to have that title under my belt.’
McNaught said he would rest for a week before resuming training with Henry Day.
His next competition will be in Tasmania, where he aims to add another 20kg to his total.