The XS Lever Rail ghost ring sight set features multiple optic mounting options and retains an iron sight system. The Lever Rail mount is an extended scope base with a long picatinny rail mounting surface. The GSG-16 automatic rifle with ambidexdrous usable cocking lever features a multi-stage adjustable butt stock, which allows the attachment of an additional magazine (one magazine only is included). It also has Ghost Ring Sights, various Picatinny rails and a M-LOK® system.
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Steve's Gunz Bullseye Ghost Ring - Octagon barrel  - Marbles Bullseye Ghost Ring for Rossi 92 Octagon barrel Rossi carbines. Nice Reviews Caldwell Picatinny Rail Mount And Ghost Ring Sights For Picatinny Rail On 1895 Sbl You can order Caldwell Picatinny Rail Mount And Ghost Ring Sight This is a solidly made rail and ghost ring system. Do not expect to co-sight the low aperture with a red dot or holo-sight as you would with BUIS on an AR platform. It is just too low to be fully seen on any optic that I tried. You need to remove the existing rear sight by tapping out the dovetail.