Dispute continues after ATF again classifies SIG's muzzle device as silencer

Sig Sauer MPX carbine

The SIG Sauer MPX carbine on display at the 2013 Shooting Hunting Outdoor Trade Show. (Photo: Daniel Terrill/Guns.com)

The Bureau of Alcohol, Tobacco, Firearms and Explosives agreed to once again delay its final classification of a SIG Sauer muzzle device, which SIG contends is a muzzle brake but ATF classifies a silencer.

The U.S. District Court in the District of New Hampshire issued the order, signed by both parties, on Sept. 9 and extended the stay of litigation to Nov. 1.

According to the order, after re-examining the item, the ATF concluded that it was still a silencer, rejecting SIG’s argument. SIG has until Sept. 19 to submit a response.

SIG and the ATF took a break from the argument in June, when the two parties agreed to extend the ruling to Sept. 17 so the ATF could re-evaluate the device. SIG filed the civil suit against the federal agency in April, a little more than a year after introducing the muzzle device.

The item in question is the muzzle of the SIG MPX carbine. Its 9.5-inch muzzle brake welded to a 6.5-inch barrel can double as the internal components for a silencer. If equipped with a metal cover it would suppress sound.

Unless the ATF changes its position or SIG gives up, the dispute will likely continue in court. There’s no set date for a final verdict.

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