Trijicon 4x32 ACOG w/Bosses Eyepiece Flip Cap Black. Constructed with a rigid ring on the cap the eyepiece flips open to reveal the micro-mesh surface that allows the shooter to see the full field-of-view with or without a red dot. The patented lens closing system of the Eyepiece Flip Cap provides a "flip-open" effect when the cap is in the open position. When the flip cap is in the closed position it protects the rear lens from rain snow debris and is easily pushed down when tossed into the pocket or pack. Soft rubber edges on all exterior contact points provide a comfortable and secure fit. The same rugged dependable performance found in all Trijicon Rifle Scopes is found in all Rifle Scope accessory mounts adapter plates and detachable mounts. For those that want the ''Instant Eye Cap'' look no further. All Trijicon Rifle Scope Lens Covers are manufactured with extremely tough and durable materials and will stand up to even the most determined abuse. Specifications for Trijicon 4x32 ACOG w/Bosses Eyepiece Flip Cap: Manufacturer: Trijicon Objective Lens Diameter: 32 mm Finish: Matte Color: Black Condition: New Fit: Any 4x32 ACOG with or without integrated mounting bosses for Red dots Attachment Type: Slip On Package Contents: Trijicon 4x32 ACOG w/Bosses Eyepiece Flip Cap Trijicon AC11030: 4x32 ACOG w/Bosses Eyepiece Flip Cap Black