A New Hampshire man was arrested Thursday after he flashed his gun at another driver on Interstate 95 in Lexington, State Police said.
A trooper from the Concord State Police barracks responded to a call of road rage around 3:05 p.m. Thursday, after a caller reported that a man in a black pickup truck had flashed a gun at him.
The man, Matthew McKinney, 26, of Alexandria, N.H., was pulled over on the Exit 29B ramp on I-95 southbound leading to Route 2 in Lexington.
McKinney was taken into custody without incident following the traffic stop, State Police said.
Troopers searched the pickup truck and found a .45-caliber Smith & Wesson handgun, a set of brass knuckles, two magazines containing a total of 13 .45 caliber rounds of ammunition, and a backpack with 32 loose rounds of .45 caliber ammunition.
Troopers determined McKinney is not licensed to carry a firearm in Massachusetts.
McKinney was arrested and booked at the Concord barracks, and bail was set at $340.
McKinney was charged with assault with a dangerous weapon, unlawful possession of a firearm without a license, unlawful possession of ammunition without a permit, and possession of a dangerous weapon (brass knuckles).Ben Thompson can be reached at firstname.lastname@example.org. Follow him on Twitter @Globe_Thompson.