Sergeant Freddy Cruz, public information officer, examines a revolver during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 19, 2013 in Miami. Miami residents turned in more than 100 firearms at Jordan Grove Baptist Church in exchange for more than $1,000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Police officer Paul Gourrier takes down the serial number for each firearm during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 19, 2013 in Miami, Fla. Miami residents turned in more than 100 firearms at Jordan Grove Baptist Church in exchange for more than $1,000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Rounds of AK-47 bullets were turned in along with a magazine clip without the assault rifle during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Sergeant Freddy Cruz, public information officer, examines a revolver during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Greg Pelham, a police instructor and safety officer, left, points to a .44 Colt revolver held by an officer who declined to give his name talking to the Rev. Gregory Thompson during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Greg Pelham, a police instructor and safety officer, left, points to a .44 Colt revolver held by an officer who declined to give his name talking to the Rev. Gregory Thompson during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Ammunition rounds are separated during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
Officers grab onto a sawed-off shotgun (33) while organizing firearms during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
A group of unvouched-for handguns were dropped off by a resident during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD
An AK-47 ammunition round is displayed during a Gun Buy Back event at Model City NET - Jordan Grove Baptist Church on Saturday, Jan. 26, 2013 in Miami, Fla. Miami residents turned in over 100 firearms at Jordan Grove Baptist Church in exchange for over $1000 in gift cards to Walmart and Winn Dixie. Max Reed / FOR THE MIAMI HERALD