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EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black

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Advanced Design for Pump Shotguns




Optimized for pump shotguns, the advanced design features and high-impact, polymer construction of the EX Performance Adjustable Stock and Forend make it an ideal choice when upgrading your Mossberg 500 & 88*, 590 series 12g pump shotgun.

The EX Performance Adjustable Stock features an easy-to-reach rapid adjust lever for custom length-of-pull, and includes an integrated QD swivel attachment and molded in non-rust standard sling swivel attachment. Durable polymer construction with a comfortable non-slip vented rubber recoil pad, oversized extra strength adjustment pin, and sleek industrial design.

The EX Performance Forend features a 2 inch picatinny rail concealed under the nose cap. Uncovered it’s ideal for attaching tactical accessories like lasers or lights. Constructed of durable of high performance, lightweight polymer.

The EX Performance stock set is also available for the Remington 870 12g. 

  • Designed for owner installation
  • Accessory rail concealed under forend nose cap
  • Adjustable Stock
    • Maximum Length:
      15” with recoil pad
      14” without recoil pad
    • Minimum Length:
      11.5” with recoil pad
      10.5” without recoil pad
  • Integrated sling attachment points
  • Available in Black
  • Compatible with Mossberg 500 & 88*, 590 series 12g pump shotguns
  • Made in the U.S.A.
  • NTOA Member Tested and Recommended
* Important! EX Forend installation requires all Mossberg Maverick 88 or Mossberg 500 models made after March 2020 to purchase a 7 3/4" or 6 3/4" 12 gauge metal action slide tube assembly and forend retention nut from Mossberg, a local dealer, an online retailer or directly from Adaptive Tactical.
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Slide Tube Assembly
Shockwave NOTICE: The EX Forend is compatible with the Mossberg Shockwave platform, however Adaptive Tactical does not recommend use of the EX Forend or EX Tactical Lighted Forend in conjunction with the Shockwave firearm. The dimensions of the EX Forend combined with extreme use conditions can potentially position the shooter’s hand in close proximity to the muzzle end of the firearm. This scenario could result in serious to life threatening injuries. To minimize the potential for accidental discharges and/or serious injury, Adaptive only recommends the use of the factory forend with the safety strap.  

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Kelly Dale Floom
2024-11-20
perfect just what my 590 needed.
EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black
Paul Roberts
2023-03-08
I purchased the kryptek Highlander adjustable stock and fore end for my Remington 870 super mag . The fore end wouldn’t work on it . I called and talked to customer service. Told them I love the accessories just the fore end wouldn’t. So they came up with a suggestion ( note they don’t do this for free) that I could send my old fore end in and they could kryptek dip it for me to match . They went above and beyond to make everything right ! GREAT CUSTOMER SERVICE ! Will definitely recommend them and order from them again ! Thank you !
Chad P
2021-07-07
Great material used to make these parts and feels comfortable in the shoulder and when handling. Seems durable to last for a long time. Would recommend to anyone looking for a change up to their layout!
Adaptive's Reply
Durable and comfortable - sounds like a great combination for upgrading your Mossberg. Thank you for the 5 star review, enjoy your new EX Stock & Forend Set.
Richard C
2021-02-01
Good setup and they are very helpful. Install instructions are spot on.
Adaptive's Reply
Glad your installation was smooth and easy. We appreciate the positive feedback on the product and instructions.
Brandon K
2020-06-22
This kit fit perfectly and is a great addition to my shotgun. I am very glad I bought this kit. It was exactly what I was looking for.
Adaptive's Reply
Fantastic! Glad you are excited and pleased with your Sidewinder Venom - your shotgun thanks you. Enjoy!
EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black
Jerry
2023-08-21
Perfect fit! Looks amazing. The best part about this experience is the company. You won’t get better service from anyone else.
EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black
Mark
2022-06-13
Looks amazing simple install The only setup i will use from now on
Dwight K
2021-03-10
Great fitment, comfortable stock, and easy to install. I am very pleased with this purchase.
Adaptive's Reply
We are pleased that you are pleased! Thank you for the 5 star review - enjoy your new EX Stock and Forend!
Vincent C
2020-12-28
I did a similar conversion on another shotgun using a different M4 style stock. The adaptive Tactical was slightly more expensive, but far better quality. I would use there kit again, and I am considering swapping the kit on the other shotgun to adaptive tactical
Adaptive's Reply
Thank you Vincent - glad you were pleased with the quality and performance of our Mossberg Stock Set. We look forward to outfitting your other shotgun. Happy Shooting.
Lenning L
2020-06-15
Bought this for n old Mossberg Maverick I've had sitting round for years. Looks and feels like a completely new shotgun.. easy to assemble and the recoil pad is top of the line.
Dakota Eichhorn
2023-06-06
Awesome kit had zero issues fast delivery! Highly recommend
EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black
Tom L.
2022-02-06
You folks made me very happy with your Mossberg rear stock, forend, light and shell holder deal. But I am even happier now that I have installed those items and shot my gun today. Wonderful products! I have a really messed up left shoulder so extending my left arm to hold a long gun is hard, but even harder to rack a slide. Your, MY, adjustable rear stock with pistol grip made it easy for me to shoulder, fire and rack the slide on my Mossberg. I fired a bunch of slugs and 00 Buck today and the bonus is that recoil pad is outstanding! Thoroughly pleased with your shotgun stock and accessories. I will be outfitting my other Mossberg soon. Thank you very much. Tom
John M
2021-03-07
As advertised.
Adaptive's Reply
Much appreciated! Thank you for choosing Adaptive for your Mossberg build. Enjoy!
Richard L
2020-12-06
Fit very well. All the hardware was included. The choice of using or not using the sling mount is nice. No problems here!
Adaptive's Reply
Sounds like everything went as planned - thank you for the 5 star review Richard. Happy shooting!
Bryon G
2020-06-14
I was looking for a way to turn my turkey gun into home protection. This did the trick. Easy to install and very comfortable.
Adaptive's Reply
Thank you Bryon - glad the transformation is complete. The EX Stock & Forend Set has great features for home defense shotguns. Enjoy!
jbrodnax
2023-04-05
Easy to install. Quality construction. Would recommend. Going to make my mossberg a jellyhead slayer.
EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black
Terry Clayton Estis
2021-08-09
Fit and finish where great! Easy to read instructions. I am very pleased with how my maverick 88 looks now!
Adaptive's Reply
Looks great - thank you for sharing your Mossberg build pictures. All the best!
Gary L
2021-02-13
This is exactly what I wanted. By far, the best butt stock on the market. Perfect fit. Perfect feel. Perfect look. Thanks Adaptive Tactical for the fast shipping and great customer service!
Adaptive's Reply
We will take "Best Stock on the Market" any day!! Thank you for the positive feedback. Enjoy your new stock!
EX Performance Adjustable Stock & Forend - Mossberg 500/590/88, 12g - Black
Jason M
2020-11-29
Excellent quality. Easy install with provided tool and instructions.
Adaptive's Reply
Thank you Jason. Your shotgun upgrade looks great. We appreciate the photo and positive review. Keep checking back for other new products.
Nicolae M
2020-06-09
Awesome Company & awesome products.. Order was delivered before expected?
Adaptive's Reply
Fantastic! Here when you need us for anything else. Enjoy!

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