Springfield M1A1 Super Match

The Springfield M1A1 Super Match is a semi-automatic rifle owned by Rika Minami. She has modified the gun to include features such as a scope with a laser sight. The M1A1 is primarily used by Rei Miyamoto, who uses the attached bayonet as a spear, but has been used by Kohta Hirano and Takashi Komuro briefly.

Overview
"There are actually very good reasons they took out the rapid-fire function even in the M14's used by the American Marines. With a fully-automatic gun, the user is easily knocked down from the recoil, and it becomes difficult to aim properly with the barrel jolting all over the place, and of course it is also very wasteful." -Daisuke Sato

Plot
The gun was found in the Locker of Rika's house. Kohta inspects this weapon first. It is then taken by Rei to use as a spear, because of its bayonet. Rei is always seen using it as a spear, but it was fired once. When the group was pinned down at a wire blockade, Takashi makes a desperate attempt to fight back by shooting "them" with it. He misses every shot, and as it was on Rei's breasts, she sustained injuries from the recoil. The red dot sight does not work due to the EMP and has since been removed. She still uses it as a spear.

Trivia

 * Althrough it's Rei's primary weapon, she has never fired it. Kohta was the first to fire it at Rika's house and Takashi fired it again when the group was in a dead-end.