Ergo Stock Adapter Polymer Black for Mossberg 500, 590 & Shockwave 4454

Use the ERGO Adaptor to install an AR stock/brace & pistol grips on your Mossberg 500/590 shotguns. Accommodates mil spec or commercial buffer tubes. ALL NFA RULES APPLY

Compatible with both 590 Models & Shockwave.

• Use any style AR stock/brace and pistol grip combination
• ALL NFA RULES APPLY
• Accommodates mil spec or commercial buffer tubes
• This adapter has the proper drop designed in, so factory sights can be used. (Bead, Rifle, and Ghost Ring Sights)
• Made from glass filled polymer
• Includes mounting hardware
• Torque specifications for grip screw is 25-30 inch-pounds. DO NOT EXCEED. Product damage can occur because of over tightening.
• NSN 1005-01-652-2229