Aimpoint ACRO/Micro ECOS-O 34mm Scope Adaptor. This scope adaptor by Aimpoint is a unique no-nonsense adaptor that simply fits scopes with a 34mm outer diameter. When you don't have the right scope for your econolight red dot sight you can still use the right scope on your econolight red dot sight with the Aimpoint ECOS-O 34mm scope adaptor. Either way you will still need an Aimpoint 34mm adaptor for ECOS-L and ECOS-L-T to fit a 34mm scope to the device. You can even use the Aimpoint 34mm ECOS-O Adapter w/ Scope Adapter to get your econolight red dot sight mounted on an Aimpoint 34mm scope with the EOS-Light attached. Aimpoint ECOS-O 34mm scope adaptors install in seconds using the right Aimpoint Red Dot Sight Adapter. Specifications for Aimpoint ACRO/Micro ECOS-O 34mm Scope Adaptor: Manufacturer: Aimpoint Condition: New Package Contents: Aimpoint ACRO/Micro ECOS-O 34mm Scope Adaptor Aimpoint ACRO/Micro ECOS-O 34mm Scope Adaptor 200153