The rifle maker -- who said his name is Matt but declined to give his last name -- told NBC News he would try again.
Matt, from British Columbia in Canada, said it took three days to build the rifle and nearly 27 hours to print the parts on an industrial-level 3-D printer at a company where he works that "makes tools related to the construction industry."
It took 13 hours to print the receiver, 6-1/2 hours to print the barrel, 5 hours to print the stock and 2 hours to print the rifle's "internals," he told NBC News, adding he had his employer's permission.
The printing of 3-D guns is a controversial subject, and some U.S. legislators are pushing laws to ban the practice.
When fired, the rifle's barrel "split along both sides" and "the receiver split along the top, but it did fire the round," Matt said.
"I am currently redesigning it and will try again."