On a day when only two finals were scheduled, Oman was on the podium for both events at the Ghala Shooting Range.
Bahrain clinched a golden double; its shooters took the team gold in the 10m air pistol event, while its ace markswoman Mozah Abdul Rahim was on top in the individual category.
The Bahraini team, comprising Samira Abdul Jalil, Mozah and Lubna Abdulaziz, collected a total of 1,109 points in the team event for the top honours.
The Omani trio of Wadha al Balushi, Sahir al Jamhani and Marwa al Jalboobi finished with 1,097 to grab the silver, while the Qatari team of Dana al Mubarak, Hannadi Mubarak and Nasra Mahmood bagged the bronze medal with a score of 1,089.
In the individual category, Mozah garnered 192.6 points for the gold medal, while Qatar's Hannadi took the silver with 186.5. Oman's Wadha settled for a bronze with 170.1.
Earlier in the morning, the tennis doubles event began at the Sultan Qaboos Sports Complex (SQSC) with Oman's Fatma al Nabhani giving the hosts a winning start along with Sarah al Balushi.
The duo proved too good for the Qatari pair of Aula Murrad and Mubaraka al Naimi, winning 6-1, 6-0. The other Omani team of Maryam al Balushi and Samar al Bakri won its opening match, beating the Kuwaiti-UAE duo of Sarah Babahani and Fatma al Janahy 6-1, 6-2.
Also in a basketball match on Monday, Bahrain edged past Kuwait 38-34, to register its second successive win. On Sunday night, Bahrain beat UAE 50-40 after the opening match saw Oman lose to Kuwait.
On Tuesday, Oman's handball team will take on Kuwait, while Bahrain will meet Qatar in the other match. Medals will be awarded in the equestrian endurance race in which a total of 22 riders from four countries - Oman, UAE, Qatar and Kuwait - are competing.
The riders will contest in team and individual categories over a distance of 80km split into three legs - 30km, 30km and 20km.
Also, athletics for the physically-challenged will begin on Tuesday.