The Bushmaster to shoot his way into the school by blowing out the glass.
The Bushmaster to kill all if not most of the victims.
One of the handguns to kill himself.
A semi-auto shotgun locked in his mother's car.
What was your Saturday source that only handguns were used in the school? A blog?
Reportedly, The 10mm Glock 20SF:
Lanza stopped shooting between 9:46 a.m. and 9:49 a.m., after firing 50 to 100 rounds.[44] He shot all of his victims multiple times, and at least one victim, six-year-old Noah Pozner, 11 times.[45][46] He shot mostly in two first-grade classrooms, killing fourteen in one room and six in the other. The student victims were eight boys and twelve girls, between six and seven years of age,[47] and the six adults were all women who worked at the school. After realizing that he had been spotted by a police officer who had entered the building, Lanza committed suicide by shooting himself in the head. ... .
A large quantity of unused ammunition was recovered at the school, along with three semi-automatic firearms found with Adam Lanza: a .223-caliber Bushmaster XM-15 rifle, a 10mm Glock 20 SF handgun and a 9mm SIG Sauer handgun.