This evidence photo from the criminal complaint of the U.S. District Court for Massachusetts v. Ashley Bigsbee for illegal possession of a stolen firearm on Nov. 15, 2015, in Suffolk, Mass., shows one of ten M11 semiautomatic handguns that former Army Reserve member James Morales stole from the Lincoln Stoddard Army Reserve Center in Worcester, Mass. Overall, AP has found that at least 2,000 firearms from the Army, Marines, Navy or Air Force were lost or stolen during the 2010s. (U.S. District Court for Massachusetts via AP)

Congress is set to force America’s armed services to keep better track of their guns and explosives, imposing new rules in response to an Associated Press investigation that showed firearms stolen from U.S. bases have resurfaced in violent crimes.

Under the proposals, the Department of Defense would tell both lawmakers and civilian law enforcement authorities more about guns that vanish from military armories, shipments and warehouses.

Overall, AP has found that at least 2,000 firearms from the Army, Marines, Navy or Air Force were lost or stolen during the 2010s.

Even as guns kept disappearing, the Department of Defense in recent years stopped advising Congress of most losses or thefts. That was one finding of an investigation which showed how assault rifles, pistols, armor-piercing grenades and other weapons have made their way onto the nation’s streets.