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HomeShopGun PartsShotgunShotgun AdaptersShop By Shotgun TypeMossberg 500/590 ERGO MOSSBERG 500/590 & SHOCKWAVE 12/20 GAUGE SHOTGUN ADAPTER
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ERGO TACTICAL DELUXE GRIP - SUREGRIP® $32.18 – $39.99

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

WARNING
Rated 3.00 out of 5 based on 7 customer ratings
(7 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

In stock

Learn the Gun Safety Rules
SKU: 4454 Categories: Mossberg, Mossberg 500/590, Shop By Shotgun Type, Shotgun, Shotgun Adapters
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  • Description
  • Additional information
  • Reviews (7)
  • 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 0.23 lbs
Dimensions 20 × 1.5 × 7 in
Reviews (7)

7 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

    Andrew Lentz – May 25, 2019

    Great concept, okay execution.
    Does as advertised and will allow you to mount AR-15 buttstocks and grips. However, the grip threading strips very, very easily, so be careful not to over tighten. You will also need a castle nut to tighten down the buffer tube because Ergo’s grip has a set screw on the bottom to tighten, but that also strips out easy.

  3. Rated 3 out of 5

    Andrew Lentz – December 18, 2019

    A very nice idea, bad execution. You’ll need a buffer tube (Yes, it’s Mil Spec) and a Castle Nut. There’s a set screw on the bottom to center the buffer tube. The downfall is in where the grip is installed. The internal threads are of the same polymer as the rest of the piece. If you over tighten or swap pistol grips multiple times you will lose all the threads. I’ve only taken my original grip off twice, and then swapped to a different grip. The threads no longer exist. Also, it’s nice with a collapsible buttstock, but anything higher than birdshot collapses the buttstock completely from the recoil which kinda mitigates its intended purpose.

  4. 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!

  5. Rated 2 out of 5

    Charles C Whittaker – February 25, 2020

    Ordered a magpul moe grip and the screw that comes with the grip is too big for the hole in the adapter.

  6. 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.

  7. Rated 1 out of 5

    Mathew – October 6, 2022

    After frequent shooting, the grip broke off. Found that the plastic next to the screw hole for the pistol grip was split up both sides

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    • AK
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    • HK91
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