The Connecticut-based gunmaker says it plans to continue its normal business operations during its restructuring.
The company is struggling with more than $350 million in debt, as well as waning sales.
Colt’s fortunes were hurt by the loss of a contract in 2013 to supply the US army with its M4 assault rifle.
Keith Maib, the company’s chief restructuring officer, said: “Colt remains open for business and our team will continue to be sharply focused on delivering for our customers and being a good commercial partner to our vendors and suppliers.”
Colt has been plagued by financial problems in recent months.
In November 2014, Colt took out a $70 million loan from Morgan Stanley to help make an interest payment.
But in May 2015 it missed a $10 million interest payment.
Last year sales of Colt’s sports rifles and handguns fell 30%.
The company has a long US history, known for making American firearms for more than 150 years.
Colt previously filed for bankruptcy protection in 1992, emerging again two years later.
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