Bids start at $5,000, after the gun was recently returned to Zimmerman in working order by the authorities.
If the weapon fails to sell, he plans to lock it in a safe to eventually give to his grandchildren. 'If I sell it, and it sells, I move past it,' he explained
In his description of the gun, Zimmerman says:
'Prospective bidders, I am honored and humbled to announce the sale of an American Firearm Icon. '
'The firearm for sale is the firearm that was used to defend my life and end the brutal attack from Trayvon Martin on 2/26/2012.'
The 32-year-old was acquitted of the charges after the fatal shooting of Martin in 2012.
He made headlines after shooting the unarmed 17-year-old on February 26, 2012, during a neighborhood patrol inside a gated community in Sanford, Florida.
The case shocked the nation, sparking protests across the country with demonstrators demanding Zimmerman's arrest and a full investigation.
On July 13 the following year, he was acquitted of second-degree murder and manslaughter.
Zimmerman told investigators he had fired because he feared for his life after he confronted Martin, who was returning from a store while visiting his father at the same town home complex where Zimmerman lived.
Zimmerman claimed he acted in self-defense during the fight where he claims he was punched by the teen.
Martin's parents have always insisted that Zimmerman initiated the fight.
Since his acquittal, he has had a series of run-ins with the law and courted online controversy a number of times by bragging about killing the African-American teenager on social media.
He was arrested on charges of aggravated assault, battery and criminal mischief after his then-girlfriend said he pointed a gun at her face during an argument.
Zimmerman estranged wife Shellie also accused him of smashing an iPad during an argument at the home they had shared. However, no charges were ever filed due to a lack of evidence.
And following his third arrest for domestic violence allegations earlier this year, Zimmerman's lawyer admitted his client 'has not been lucky with the ladies.'
Last year, Zimmerman referenced Martin's death when someone sent him the message: 'It's slap-an-idiot Wednesday.'
He replied: 'We all know how it ended for the last moron that hit me. Give it a whirl cupcake.'Hours later, he posted numerous racial slurs in a series of tweets as well as a selfie he took as he smoked a cigar in a swimming pool.
Zimmerman also branded President Obama an 'ignorant baboon' for his statements about the high number of gun-related deaths in America after the on-air shooting of WDBJ reporter Alison Parker and cameraman Adam Ward.
He sparked fury on Twitter yet again last September after retweeting a picture of Trayvon Martin's dead body.