On Thursday, the National Rifle Association (NRA) filed a federal lawsuit in North Dakota that argues the ATF's new pistol brace rule is "arbitrary" and an "abuse of power," according to Fox News. 

"The bureau is declaring that they will effectively decide on a case-by-case basis whether a firearm is subject to the NFA. Every American gun owner is in danger of potentially facing felony charges at the whim of these bureaucrats and without any new statute in place," said Jason Ouimet, executive director, NRA Institute for Legislative Action. 

NRA is joined in the lawsuit by 25 states led by West Virginia Attorney General Patrick Morrisey and North Dakota Attorney General Drew Wrigley, including Alabama, Alaska, Arkansas, Florida, Georgia, Idaho, Indiana, Iowa, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Montana, Nebraska, New Hampshire, Oklahoma, South Carolina, South Dakota, Tennessee, Utah, Virginia, and Wyoming. 

Simultaneously, Gun Owners of America (GOA), the Gun Owners Foundation (GOF), and Texas Attorney General Ken Paxton sued the ATF on the pistol brace rule, according to Breitbart. 

GOA has told us that the ATF pistol brace rule "could result in serious criminal charges for owners of up to 40 million guns if they do not register their braced firearms with ATF. "