Hi Brent - It's a red dot scope. check out Aimpoint's website for detailed information. I believe the smaller version is used in that way. It's a first class scope; I use one just like it but don't need two. Make me an offer. Thanks.
I am going to sell the Aimpoint listed above. This is new in the box, never used.
This is the special limited edition model with the following:
Kill flash Anti-reflection devise
Colt M4/AR15 Spacer
QRPII Quick detach picatinny rail mount
Military style rubber covers
The price is...