Donald Trump Jr is in hot water on social media after posting a picture of his eldest son holding a gun on Thursday.

The 40-year-old is under fire after posting a throwback picture of nine-year-old Donald Trump III holding a double-barreled shotgun while on a duck hunting trip.

'Donnie helping me out in the #duck blind last season,' he said in the post caption, tagging the photo in Texas.

The 40-year-old is under fire after posting a throwback picture of nine-year-old Donald Trump III holding a double-barreled shotgun while on a duck hunting trip

'Definitely the best #hunting buddy out there. Get them outdoors early and often... you won't regret it!!!'

The image has garnered split reactions, with many wondering if it is safe for such a young child to be holding the gun.

'Guns are a dangerous toy for a child,' said one person in the comments.

Another added: 'You truly are disgusting....'

'Please tell me this is for food and not just a sport; and that it’s being done as painlessly as possible,' a different parent stated.

But a different parent said: 'Kudos to you for teaching him gun safety & the knowledge of hunting. My father did the same for me growing up.'

Trump Jr was under fire just a few weeks ago after he shared a video of six-year-old Tristan playing with a bow and arrow.

Trump Jr was under fire just a few weeks ago after he shared a video of six-year-old Tristan playing with a bow and arrow

Just six months ago, he had posted the original set of photos of his trip in Texas with Donnie.

And just six months ago, he had posted the original set of photos of his trip in Texas with Donnie.

In 2012, Trump Jr and brother Eric were part of a hunting trip to Africa that was met with fierce criticism.

'We are both avid outdoorsmen and were brought up hunting and fishing with our Grandfather who taught us that nothing should ever be taken for granted or wasted,' the brothers said in a statement to E! News at the time.

'We have the utmost respect for nature and have always hunted in accordance with local laws and regulations. In addition, all meat was donated to local villagers who were incredibly grateful. We love traveling and being in the woods—at the end of the day, we are outdoorsmen at heart.'