It looks very plasticy from the pic, pretty sure I have seen a mouse that looks exactly the same as it as well which means it is an OEM design, I could be wrong though.
It will be a shame if it is a laser sensor, they all have built in acceleration and angle snapping. optical>laser especially for FPS games, I always had laser mice in the past but when I got my Rival with an optical sensor the difference was very noticeable and it is much more accurate.
NZXT Switch 810 - i5 2500K - Gigabyte Z68 UD3H - 8GB 1600mhz Mushkin Blackline - Zotac 970 GE - Crucial MX100 256GB SSD - Samsung F3 1TB HDD - Corsair H100 - Corsair HX850 - Asus VE247H
PC Audio: Asus Xonar STX - Sennheiser HD650.
Portable Audio: FiiO X3II - Audiofly AF140 - Etymotic ER4s - Fidue A83.