Rapper and former G-Unit member Young Buck , was evicted from his Tennessee mansion by the IRS and he  still owes more than $300k in unpaid taxes.

TMZ has learned … the former G-Unit rapper was ordered to vacate his 5,000 square foot home by May 16th.

The details surrounding the eviction are unclear — however, court docs show the judge in Buck’s  bankruptcy case signed off on the sale of the house … and ordered that the proceeds go towards paying off his massive $333,975.69 debt to Uncle Sam.

Sources tell us … the rapper — who bought the house in 2004 — was spotted earlier this week carrying boxes and removing all of his stuff from the residence.

It’s just the latest in a sad series of problems for the rapper … who filed for bankruptcy back in 2010 … and was SHOT AT 11 TIMES back in March.  (TMZ)

However the rapper have more serious matters to deal with than a eviction. He is also heading to prison for 18 months on gun possession charge. Apparently when the IRS raid his home back in 2010 they found a gun along with ammunition and as  a convicted felon, Buck is prohibited from possessing any kind of firearms.

Young Buck won’t be a free man much longer — TMZ has learned the rapper has agreed to serve 18 months in prison for gun possession, following a massive IRS raid on his Nashville home in 2010.

According to the deal, Buck agreed to plead guilty to possessing firearms and ammunition as a convicted felon.

According to legal docs filed in the case, federal agents recovered the firearms in Buck’s house during a 2010 raid – when feds busted into the house to repossess a bunch of the rapper’s belongings to settle a $300,000 tax debt.

According to the docs, feds found a .40 caliber Glock 22 in Buck’s home along with ammunition. As a convicted felon, Buck is prohibited from possessing ANY kinds of firearms.

As for the felony rap — Buck was convicted of assault with a deadly weapon after stabbing some guy at the Vibe Awards in 2004.

The judge signed off on the plea deal already but won’t formally sentence the rapper ’til July 13th. (TMZ)

Lesson of the the story, never play with Uncle Sam and his money, because he will always win. Look on the bright side, maybe 18 months in prison will result in great comeback album. What do you think?