Ironsights (M1A1 Thompson)

Summary
The Standard Aim is an optic attachement that is used for the M1A1 Thompson. A small optic sight, but has a single advantage to shoot down zombies easily. Any decent optic sight is better than nothing.

Trivia

 * This attachment adds +20 of accuracy.
 * This is the second free optic sight attachment to a non-mod weapon.
 * This is only available for the M1A1 Thompson (which requires rank 11).
 * This is the fourth optic sight to be added in the game.
 * During World War 2, the Standard Aim was never separated from the M1A1 Thompson when it was manufactured.