NcStar 3X Magnifier w/Flip to Side QR Mount G&G but it can also work

but it can also work with a (sold separately) 20 round CO2 magazine

Flip-Up Adjustable Sights

This Combo is comprised of a Mark III GEN II Tactical Scope with a Micro Dot Mount that mounts directly to the Ocular Lens Housing and a Red Micro Dot optic on top

Individually hand wound

NcStar 3X Magnifier w/Flip to Side QR Mount G&G but it can also work3X Magnifier with Flip to Side Quick Release Mount. This Magnifier can be mounted behind a 1X Reflex optic. You can quickly switch between 1X Magnified Optic for close ranges to 3X Magnified optic for intermediate to longer ranges, with a push of a button and a simple flip to side movement of the magnifier. Magnifier features a quick focus ring to keep the image in focus. Elevation and Windage adjustments with turret caps, to center your reflex optics