Up for auction is an Eotech holosight: model 521.L80 with an HHA bow mount for attaching it to a compound bow.. Takes 2 size N batteries. Red Circle-dot holographic reticle. Clamps to standard rails. I never got around to use it due to my eye sight. Great condition! Please see Ebay auction for photos!
Eotech Holographic Sight with HHA Bow Mount on Ebay 
