Sarah Palin's son Track is loaded ... TMZ has learned ... saying goodbye to his marriage with his most prized possessions in hand ... guns.

Track Palin and his soon-to-be ex-wife Britta filed divorce docs which tick off who gets what.

-- 23-year-old Track -- an Army reservist -- gets the $30,000 Wells Fargo bank account, $500 in tools, and his $1,000 gun collection.

-- 22-year-old Britta gets her $2,500 bank account and her $4,000 in jewelry. 

TMZ broke the story, the couple filed jointly for divorce in an Alaskan court ... which means they have fully settled their property and custody issues, including child support for their 1-year-old daughter.

According to the doc, Track rakes in $42,800 a year -- and has agreed to pay $642 a month in child support. Track and Britta have agreed to split any other child-related expenses, including medical and travel.

Britta gets physical custody, and will share legal custody with Track.

The sanctity of marriage.

Sarah Palin's oldest son has pulled the trigger on his marriage by filing for divorce ... TMZ has learned.

Track Palin and his wife, Britta, jointly filed divorce docs in an Alaskan court.  Under Alaska law, by filing together, they are signaling they have fully settled property and custody issues, including child support.

As for custody, the now ex-couple has a 1-year-old daughter, Kyla.  One interesting point ... Track and Britta had to watch a 48-minute video about the impact of a failed marriage on the child.

Track and Britta married in 2011. 

Track is an Army reservist and served time in Iraq.  He's a commercial fisherman and plans to go back to college.