WRENTHAM, MASS. (WHDH) - A Wrentham man is facing a raft of criminal charges after police say they found multiple assault rifles, handguns, ammunition, and homemade explosive devices while executing a search warrant at his home on Friday.

As a result of an investigation into his May Street home, the Massachusetts State Police Division of Homeland Security and Preparedness in connection with several other agencies took Michael R. Roby, 38, into custody after they uncovered five AR-15 style rifles, a Glock pistol, numerous high capacity magazines, bump stocks and five homemade bombs, according to state police.

Troopers say none of the weapons bore serial numbers and Roby did not possess a license to carry firearms.

A preliminary investigation indicates that Roby was buying parts and assembling the weapons himself.

Roby is facing several charges including unlawful possession of firearms, possession of large-capacity weapons and production, possession, transportation or use of explosive or a destructive device.

In a statement, Massachusetts State Police Col. Kerry A. Gilpin said, “This investigation and warrant execution was a shining example of a multi-agency partnership, and one that removed an arsenal of home-assembled high-capacity weapons from a defendant who was not authorized by law to make or possess them.”

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