CNC machined of anodized aluminum, Mesa Tactical's collapsible stock adapters allow the shotgun to be retrofitted with an AR-15 M4-style buffer tube, buttstock and pistol grip. The Low Tube adapter follows the pattern of the factory stock, dropping the buttstock's elevation slightly to allow the use of iron sights. The High Tube adapter follows the AR-15's straight stock line, and comes with a section of M1913/Picatinny rail that sits over the receiver for mounting optics. Both adapters come with accessory mounting points on both sides for attaching extra rails, sling swivels, or shell carriers (all sold separately). Factory iron or bead sights cannot be used with the high adapter.
Two accessory mounting points on sides of the aluminum adapter
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Mesa Tactical High Tube Telescoping Stock Adapter with Receiver Picatinny Optic Rail Mossberg 500, 590, 835 Aluminum Matte