A man has pleaded guilty to federal charges that he illegally carried bullet primers in luggage on a commercial flight to Miami International Airport.

Court records show 37-year-old Orville Braham pleaded guilty on Tuesday to two transportation of hazardous materials charges. The charges carry a combined maximum 15-year sentence but Braham will probably get less when he's sentenced May 3.

Braham was charged after about 1,000 bullet primers and an ammunition reloader were discovered in his checked baggage in December. Some of the primers ignited but no one was injured.

Braham was traveling from Boston to Jamaica when the primers were found during a Miami stopover.

Braham has been held without bail since his arrest.