Richard B. (Hook) Traylor, a nationally recognized gun expert whose Woodbridge home was damaged in a gunpowder explosion last May, was indicted yesterday on 10 counts of federal firearm violations, including storing stolen guns and ammunition in his home.

Traylor, 53, a retired District of Columbia policeman who worked as a firearms instructor for the Drug Enforcement Administration at the time of the explosion, was accused of transporting 15 stolen guns from Washington, D.C. to his suburban Virginia home between January and May of 1978.

The indictment returned by the federal grand jury in Alexandria also charges that Traylor received six firearms that were stolen from the DEA and stored them in his home along with 12 cases of stolen ammunition, three unregistered firearms and two guns whose serial numbers had been altered or obliterated.

If convicted of all charges, Traylor could be sentenced to up to 75 years in prison and a fine of $75,000.

"I don't know nothing about it," Traylor said yesterday from his Woodbridge home.

Five D.C. policemen had their police powers revoked last November after they allegedly went to Traylor's home following the explosion and removed firearms and ammunition marked as property of the D.C. police department. Officials said the missing guns and ammunition were recovered at several of the officers' homes.

Assistant U.S. Attorney Karen Tandy said the grand jury investigation is continuing.

One D.C. police official said "every one was really shocked" by yesterday's indictment. "Traylor was well liked."

At the time of the May 14 explosion, involving a combination of firearms, gunpowder and solvents, investigators said they discovered 119 firearms in Traylor's home. He and his wife were both injured in the predawn explosion, which destroyed a wall of his four-bedroom home at 1713 Azalea Lane.

Traylor was fired from his $19,263-a-year-DEA job May 25 after authorities reported finding missing government weapons in his home.

The indictment accuses Traylor of receiving six stolen DEA firearms, valued at over $100 each. The 15 allegedly stolen firearms from the District of Columbia -- five shotguns and 10 rifles -- are valued at more than $5,000.