The home favourite, a nurse with the Navy Reserve in Brisbane, shot with surgical precision and hit 59 from 60 targets at the Sydney International Shooting Centre.

Compatriot Joshua Bell finished second with 52 targets, while experienced New Zealander Paul Wilson captured the bronze medal with 39.

Adams was thrilled with his performance, which equalled the Oceania record and clinched a quota position for Tokyo 2020.

"I've been working my butt off in recent months and all the hard work paid off today," he said.

"The quota place was the icing on the cake.

"I will now take a couple of weeks off and get ready for the final Olympic selection championships beginning in February.

"My aim is to win selection for Tokyo and reach the final and then we will see what happens from there."

Another Australian snaring a gold medal and a Tokyo 2020 quota position was Bailey Groves, with the last shot in a thrilling men's 10 metres air pistol final.

Groves edged team-mate Scott Anderson by 0.1 points after finishing on a total of 234.4.

Anderson went into the final round with a 0.7-point lead, but he could only manage 19 with his final two shots while Groves shot a gold medal-winning 19.8.

"All my hard work has paid off," Groves said.

"I'm still shaking in my boots.

"0.7 was a good lead for Scott and I knew it was going down to the last shot. 

"There was a lot of pressure and the stakes were high.

"When I first looked at the scores, I thought we had tied and that we were going into a shoot-off. 

"But then I looked at the decimal point and saw that I had won."

Four-time Olympian Daniel Repacholi completed an Australian medal sweep with 213.2 points. 

Chloe Tipple won New Zealand's first gold medal of the event after dominating the women’s skeet final.

Shooting in variable conditions, Tipple set a Oceania record of 54 targets.

It proved too much for the Australian pair of Laura Coles and Aislin Jones, who rounded off the podium with 45 and 35 targets, respectively.

Tipple had already secured a Tokyo 2020 quota position earlier this year for New Zealand, and Coles managed to grab the available Australian quota position when registering a Minimum Qualification Score.

Tomorrow will see the final of the women's 10m air pistol take place.