https://cdnph.upi.com/ph/st/th/1851786643173/2026/upi/8cc9312825b73aaab0fc72bb485f8860/v1.5/Justice-Department-yet-to-appeal-ruling-allowing-silencers-some-guns.jpg" /> Gun-control groups are concerned the Justice Department has not appealed a ruling that struck down regulations on silencers and some rifles.