It would be there because he's being charged with firearms and weapons-related offences. Anything weapons-related (ie bbgun, bow, etc...) would be seized whether or not they are legal.
Scarecrow - "old geezers like myself and Starlight"
- "senility prevents me from recognizing anyone except people who owe me money.."
Greylocks - "The heck with 'getting'. I am old."
SF - "Neal! You are the one!"