The shooter in CT used "a Glock 9 mm handgun, a SIG Sauer handgun, killing 26 people, including 20 children, before turning the gun on himself.
The two pistols were found inside the school and a .223-caliber Bushmaster rifle was found in the back of his mother's car in the parking lot.
"The damage these weapons can do is just horrific," firearms expert Ronald Scott said.
All three are highly lethal weapons manufactured for combat and to stop criminals. The semi-automatic Glock and SIG Sauer are the two most popular firearms used by law enforcement officers around the country and by private gun owners, said Scott.
The Glock, made in Austria, and the American-made SIG Sauer can fire up to five bullets a second at a velocity of 1,200 feet a second.
Scott said the shooter likely used hollow point bullets, “"The bullet is meant to open up like a flower ... The nose of the bullet and spreads open, creating a devastating wound through tissue and organ that sends the victim intAo almost immediate shock.
Close enough.