Despite some of the toughest gun laws in the country, a former gun smuggler tells NBC Bay Area that illegal firearms will continue to flow into the state as long as guns can be purchased with relative ease in other parts of the country.

In fact, the wide disparity in regulations creates a lucrative market for those willing to risk running guns from one state to another, he said.

“I was out in a different state, and I just saw how easy it was for people from that state to just get a gun,” he said.

The former gun trafficker is now in the federal witness protection program after being arrested and testifying against some of his former associates. He agreed to share his story on the condition NBC Bay Area would not reveal his identity.

The smuggler, who asked to be called Roger, said the hundreds of guns he purchased in the Midwest over a two-year period were a hot commodity on Bay Area streets, selling for three or four times what he originally paid for them.

“Out here [prices] are high,” Roger said. “I could probably get like $800 to a $1,000 for a gun.”

Roger contacted NBC Bay Area following a joint investigation with the non-profit journalism organization The Trace, which found more than 20,000 guns across the country that were previously reported stolen were later recovered by police in connection to crimes.

But Roger said he never resorted to stealing guns because he could easily purchase them out of state. He says he made so much money illegally selling guns in the Bay Area that he gave up selling marijuana.

Roger: There was more money [selling guns] and it was kind of easier.

Stephen Stock: There was more money in guns than drugs?

Roger: Yeah

Stephen Stock: And it was easier?

Roger: Yeah

Stephen Stock: What do you mean by that?

Roger: It was easier to send them in the mail. Easier to get them

Roger said he would travel to a state that NBC Bay Area agreed not to disclose, where he made contacts with residents who would go into pawn shops or gun stores and legally purchase guns. Without any kind of waiting period, they could walk out with guns in hand the same day. Roger, for a small markup, would then buy those guns from the person who legally purchased them. It’s a transaction known as a “straw purchase” and the Bureau of Alcohol, Tobacco, Firearms and Explosives says it’s one of the premier methods convicted felons use to get their hands on guns they’re prohibited from owning.

Stephen Stock: How did you get the guns to California?

Roger: Ship them, send them.

Stephen Stock: Through the mail?

Roger: Yeah, through the mail. UPS. However..

Stephen Stock: Did you have to pack them special, or did you just put them in the mail and ship them?

Roger: Yeah, different ways. We put them in toolboxes, safes, microwaves.

Stephen Stock: You put a gun in the microwave and shipped it?

Roger: Yeah, quite a few of them

NBC Bay Area’s Senior Investigative Reporter Stephen Stock sits down with a convicted gun runner to talk about how he brought guns from the Midwest to the Bay Area

Duke University Professor Doctor Phillip Cook, one of the country’s foremost researchers of gun violence, says restrictive gun ownership laws in one state can create a market for gun traffickers like Roger.

“We found that 60 percent of the guns picked up from the streets of Chicago were first sold out of state,” Cook said. “There’s a lot of trafficking going on.”

And once those guns end up on the streets, Dr. Cook said they can have a long shelf life before they’re ever seized by police.

“Guns stay in circulation forever,” Cook said. “In Chicago, the average age of the gun that is confiscated is at least 12 years old. So they’ve been around for a while. It’s unusual to see a new gun get picked up by the police, and they manage to change hands many times.”

The wide variation in gun laws between the states can make policing gun trafficking difficult, according to federal law enforcement officials.

“The traffickers, they know where their market is,” said Kevin O’Keefe, chief of Operational Intelligence for the Bureau of Alcohol, Tobacco, Firearms and Explosives. “If there market is a large urban area, they know that they’re going to get the guns to that urban area. Let’s say there are more restrictive gun laws in that city as opposed to nearby states or other municipalities, the profit is made by getting guns to that market.”

Roger said he knew many of the guns he sold were being purchased by people with bad intentions, but the money was too good to pass up. Roger also acknowledges that some of the guns he sold in the Bay Area may have been stolen or reported stolen. Roger says he just didn’t want to know, so he did not ask about the origins of many of the guns he sold. He says he’s on the straight and narrow now. He’s holding down a regular job and is focused on raising his kids.

Now, looking back on his former life, Roger says he does have some regrets about bringing guns into his own community.

“I never knew if I knew somebody that actually got killed with one of the guns I sold on the streets,” he said. “I don’t ask them, and they’re not going to tell you what they’re doing with [them] anyway. So 10 times out of 10, it’s illegal anyway.”