Moms Demand Action for Gun Sense, the national organization formed after the shooting at Sandy Hook Elementary in 2012, Friday called upon U.S. Rep. Mike Coffman, an Aurora Republican, to drop his support for a measure that they claim would allow guns in schools without a permit.

The Concealed Carry Reciprocity Act (House Resolution 38) would allow anyone with a concealed weapon to bring that weapon into another state, even if the person doesn’t meet that state’s requirements for a concealed carry permit.

The Colorado chapter held a press conference Friday in front of Coffman’s Aurora office to point out that Colorado’s concealed carry laws would be rendered useless under the act.

According to Lynn Barta of Littleton, a resident of Coffman’s Sixth Congressional District, the act would gut Colorado’s gun laws that require those who apply for concealed weapons permits to take safety training and undergo a criminal background check. Barta pointed out that 12 states have no requirements for concealed weapons permits, but under the Act those individuals could bring a concealed weapon into Colorado without having to gun through the state’s permit requirements.

Under H.R. 38, concealed weapons would be allowed on federal lands, including national parks, lands controlled by the Army Corps of Engineers (that would include Cherry Creek and Chatfield dams), National Wildlife Refuge lands, and public land under the jurisdiction of the Bureau of Land Management and the Bureau of Reclamation.

Coffman’s spokesperson did not immediately return a call or e-mail for comment Friday afternoon. (This story will be updated at the top if we hear back.)

The measure’s biggest backer is the National Rifle Association. The NRA argues that the Second Amendment shouldn’t recognize state borders.

“While most states already recognize this and have provisions allowing for reciprocity for concealed carry permits from other jurisdiction, a minority of antigun states have made a point of arresting out-of-state residents who carry or transport otherwise lawfully owned firearms in their jurisdictions,” the organization states.

“This sort of ‘zero tolerance’ enforcement has nothing to do with public safety and everything to do with punishing people who believe in the Second Amendment. There is nothing legitimate about a state using its police powers to suppress the constitutional rights of fellow Americans.”

State laws that prohibit concealed weapons in state or local government buildings or parks would still be upheld, according to the bill.

According to July news release from the National Law Enforcement Partnership to Prevent Gun Violence, the measure would force police to verify whether a permit from another state is valid.

“Reciprocity would leave law enforcement helpless to keep guns out of the wrong hands when a person claims ‘constitutional carry’ authority,” the statement said. In addition, efforts to verify a permit or ID card could “comes with potential legal liability for law enforcement, an outrageous outcome for an officer trying to protect his or her community.”

Barta said her group met with Coffman’s staff on Tuesday, and “it became clear Coffman would not reconsider” his position on the bill. Coffman signed on as a co-sponsor on June 23; Colorado’s three other Republican members of the House all signed onto the bill when it was introduced on Jan. 3 and it now has 208 co-sponsors, including three Democrats. And while he co-sponsored similar legislation in 2009, Speaker of the House Paul Ryan of Wisconsin has not signed onto the bill.

A similar measure is also awaiting action in the Senate, but Colorado’s junior Sen. Cory Gardner, a Yuma Republican, has not signed on as a co-sponsor. That measure, S. 446, has 37 Republican co-sponsors, but that does not include Senate Majority Leader Mitch McConnell of Kentucky.

The Colorado General Assembly, during its last session, also considered a concealed carry reciprocity measure, which cleared the Republican-controlled Senate. It died in the Democratic-led House on April 26.

Also joining the small group outside of Coffman’s building: Tom Sullivan, whose 27-year-old son, Alex, died in the 2012 Aurora theater shooting. He pointed out that 19 states don’t require safety training in order to obtain a concealed weapon permit. This bill “is the top priority of the gun lobby in Congress,” he said. Rep. Coffman “should be standing up for public safety, not the gun lobby.”

Barta pointed out that her group is not against the Second Amendment. “We do not want to take away people’s rights to guns,” she told Colorado Politics. The chapter head, Robin Horn, pointed out that she owns guns and has spent her entire life around hunters, and if the group intended to take guns away from law-abiding people, she wouldn’t be part of the group.

“We have no problem with responsible gun owners,” said Barta. “We just want to keep guns out of dangerous hands. She warned that if Coffman does not reconsider his sponsoring of the bill, “We won’t forget.”

She also noted that nine national and international law enforcement groups oppose the concealed carry bill, including the Commission on Accreditation for Law Enforcement Agencies, the International Association of Chiefs of Police, the National Organization of Black Law Enforcement Executives and the Hispanic American Police Command Officers Association. It is also opposed by the U.S. Conference of Mayors.

“We have no problem with responsible gun owners,” said Barta. “We just want to keep guns out of dangerous hands. She warned that if Coffman does not reconsider his sponsoring of the bill, “we won’t forget.”

The group later went up to Coffman’s office with more than 400 postcards, which they claimed came from residents of his district who oppose the measure, and gave the postcards to a member of Coffman’s staff.

H.R. 38 is awaiting action from the House Subcommittee on Crime, Terrorism, Homeland Security, and Investigations, which is under the House Judiciary Committee. Rep. Ken Buck of Greeley is a member of that judiciary committee. The Senate version, S446, which was introduced in February, has not yet been assigned to a committee.