EOTECH Model 557 Holographic Weapon Sight with Side-Button Controls
The EOTECH 557 is a holographic weapon sight built around a wide, heads-up viewing window and a side-button control layout. Controls include an NV button and up/down brightness adjustment for quick access without reaching behind the optic.
This unit mounts via an integrated rail base with a cross-bolt and thumbscrew style clamp for 1" Weaver / MIL-STD-1913 Picatinny rails. The reticle is a circle-and-dot holographic pattern with additional vertically-stacked aiming references.