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Home Shop ERGO Grips Shotgun Shotgun Adapters Shop By Shotgun Type Mossberg 500/590 ERGO MOSSBERG 500/590 & SHOCKWAVE 12/20 GAUGE SHOTGUN ADAPTER
15-slot full rail covers
ERGO 15-SLOT DIAMOND PLATE FULL RAIL COVERS - 3 PACK $17.75
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ERGO 2 AR GRIP - SUREGRIPĀ® $23.75 – $25.99

ERGO MOSSBERG 500/590 & SHOCKWAVE 12/20 GAUGE SHOTGUN ADAPTER

WARNING
Rated 4.00 out of 5 based on 3 customer ratings
(3 customer reviews)

$30.99

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.

Need replacement hardware? Click here for ERGO Mossberg Hardware Packs

For best installation, we suggest using the 3/16 Wrench

Only 9 left in stock

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SKU: 4454 Categories: Mossberg, Mossberg 500/590, Shop By Shotgun Type, Shotgun, Shotgun Adapters
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  • Description
  • Additional information
  • Brand
  • Reviews (3)
  • Shipping & Delivery
Description
  • 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

INSTALLATION

[youtube https://www.youtube.com/watch?v=yYQQr3LG8HM]

Additional information
Weight 0.260 lbs
Dimensions 20 × 1.5 × 7 in
Brand

Brand

ERGO

Reviews (3)

3 reviews for ERGO MOSSBERG 500/590 & SHOCKWAVE 12/20 GAUGE SHOTGUN ADAPTER

  1. Rated 4 out of 5

    mike – December 13, 2017

    Seems pretty durable. Ergo you need to add “mil-Spec” to the description as it doesn’t state whether it’s commercial or Mil-Spec. Also, during installation theres a little tab that needs to be knocked out to pass the bolt through to mount it to the receiver. All in all really good product and lets me mount any AR/M4 collapsible stock and grip.

  2. Rated 3 out of 5

    Anonymous – January 9, 2020

    Upon initial inspection it’s great! Fits my Mil-spec stock great! The problem is the grip! A MFT grip is far to large to mount on it, and won’t align properly! Will try a magpul one and update from there!

  3. Rated 5 out of 5

    Jupiter – September 22, 2020

    Great adapter for $39
    I’ve had mine for over 5 years and over 500 rounds of 2 3/4 00.
    – – – Things to know – – –
    Mil-Spec or Commercial tube.
    Need a castle nut.
    The grip matters 100% because the grip mounting angel is already reduced.
    Standard angel grip are a little more vertical, reduced angels can be completely vertical or develop a forward cant.
    I recommend flat top grips. If the grip has a thicker back strap, then there are two issues I’ve found.
    1.) You may not be able to hit the action release with your thumb AND
    2.) The collapsible stock could get in the way of a proper grip by riding on the webbing of your hand.

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