Steven King, owner of Metro Shooting Supplies, shows the proper use of the popular Smith & Wesson AR-15, 556 caliber rifle at his store in Bridgeton, Mo. on Nov. 12, 2014. A federal judge last week struck down regulations on silencers, shot-barrel rifles, and short-barrel shotguns. File Photo by Bill Greenblatt/UPI. | License Photo

Aug. 13 (UPI) -- Gun control groups are concerned that the Trump administration has yet to appeal a federal court ruling last week that struck down parts of the National Firearms Act that limited deregulated short-barreled rifles, shotguns, and silencers

U.S. District Judge Wesley Hendrix of the Northern District of Texas ruled Aug. 5 that federal restrictions on gun control could not stand after last year's One Big Beautiful Bill Act eliminated a $200 fee to transfer or produce certain firearms.

Hendrix gave a one-week deadline to request a stay of his ruling, which expired early Thursday.

"Today, our government is failing us," Brady President Kris Brown said in a statement on Thursday. "At midnight, uniquely lethal weapons and devices -- including silencers, short-barreled rifles, and shotguns -- were deregulated for the first time in nearly a century. The Department of Justice had the opportunity to act to protect our safety, but it failed to do so."