First Korean War era USMC M3 night eyesight scope The M3 carbine was an M2 carbine fitted with a mount designed to take an infrared sight to be used at nighttime. It had been in the beginning utilized Using the M1 sniperscope, and an Energetic infrared sight, and noticed action in 1945 with the Army in the course of the invasion of Okinawa. Unco