Additional Info Factory New

Mossberg 590 Shockwave 20 Ga Black 14" Barrel 50657

Out of Stock


With credentials hard-earned over decades of military and law enforcement use, the 590 Shockwave is the perfect choice for your personal and home defense needs. Small in size, but big in power, this little guy can do major damage while only having a overall length of 26.37". 


The Shockwave Raptor bird’s head pistol grip is uniquely shaped to minimize felt recoil. Includes all the features that have made Mossberg pump-actions the choice for millions worldwide: ambidextrous safety, dual extractors, positive steel-to-steel lockup, twin action bars, and a smooth operating anti-jam elevator.


  • Family: 590 Series
  • Model: 590 Shockwave
  • Type: Shotgun
  • Action: Pump Action
  • Finish: Blued
  • Stock/Frame: Synthetic Stock
  • Stock/Grips: Raptor Grip
  • Weight: 4.95 Lbs
  • Caliber/Gauge: 20 Gauge
  • Chamber: 3"
  • Capacity: 5+1
  • Barrel: 14.375"
  • Overall Length: 26.37"
  • Choke Tubes: Cylinder Bore
  • Sights: Front Bead
  • Additional Information: Corn Cob Forend W/strap, SOT Not Required: 26.5" OAL, Raptor Grip
More Information
MODEL 590 Shockwave
TYPE Pump Shotguns
UPC 015813506571
Condition: New
Manufacturer: Mossberg Firearms
Model: 590
Caliber: 20 GA
SKU: 015813506571
MPN: 50657
UPC: 015813506571
Vendor: Gunprime
Reviews (41)
By Yasmin on 03/01/24
Exactly what I wanted

I needed a smaller shotgun and this was perfect. Gun prime had it for a great price and it arrived at the FFL 27 hours after I ordered it. I’ve never had something delivered that fast before. I’ll definitely be using gun prime again.

By Wallbanger on 12/15/23
fun gun to shoot

Have had no problems with the gun except loading. Should have gotten 12ga, my fat fingers don't fit so well with 20ga

By Striper226 on 12/13/23
590 shockwave 20

Just got it nice gun. Haven’t fired it yet because it’s a gift. Probably get the 410 too.

By JimmyJazz on 11/28/23
Awesome firearm..Lighting fast delivery..had it in my hands in 4 days..and the price was right on the money..would definitely recommend and purchase from Gunprime again...Thank you Guys

Love everything about my Mossberg Shockwave

By Arizona on 11/04/23

Great price. Service, Follow up and after sale support.

By Thatguy on 09/15/23
Gunprime is awesome

Fun shooting. 20ga is much more manageable.. fast shipping, great pricing couldn't ask for more.

By Reg on 07/21/23

A beast with a green laser! Mini hulk. I've only ran 2 3/4 target shells through it but it's ran flawlessly. Insanely accurate and in 20ga I'm surprised it's even legal. Awesome for home protection. My wife can handle it and I may just buy one more.

By Alex on 07/13/23
Great service as advertised

Gunprime has always given great quality and a better price every time. Strongly recommend you do business with this company. I will continue for years to come.

By Graham A on 06/10/23
Smooth Flawless transaction

Loved the gun and the service!

By Deez Nutz on 06/03/23
Fun to shoot for for home defense

Fun to shoot for for home defense

By rm on 05/31/23
excellent choice

the online shopping, price, purchasing, delivery of item was an excellent service through gunprime. The product is better than expected. The only thing I would do differently is purchase this model with the laser saddle already installed from the factory. It would be worth the extra cost.

By ThePuebloKid on 03/30/23
Impressive little defense package!

I got the 20 gauge for the better recoil management and I'm glad I did because it still has some kick. I started out shooting high but once I figured it out and got on target the gun is pretty impressive. Target was 12x12 attached to a 2x4 mounted in a cross brace and at 20 yrds kept blowing it over. 7 shot shells, very devastating. ONE PROBLEM: when I went to clean it after shooting I couldn't get the trigger assembly out of the gun. The grip was tightened too tight at the factory and comes down over the edge of the trigger guard. Cant get the plug out of the grip to access the mounting screw without marring up the plastic. Still waiting on Mossberg to get back to me. But that aside, this is my new home defense weapon for sure!

By Wolfgang dre on 03/29/23
Great overall

From purchase to in hand the whole process took about 1 week. Gun came as showed in pic. Really happy with the quality of this shotgun and compact size. Will be buying from this site more in the future for sure.

User uploaded images:

By Gia N on 03/22/23
Awesome service

I was kinda hesitant to purchase a gun online but took a chance with Gunprime since they had the best price and so glad I did!
Great communication, fast shipping and gun came in perfect new condition!!

User uploaded images:

By Gerhard Worner on 03/15/23
Great service, fast delivery and best prize on the net !

Not used yet

By Mikemil on 03/09/23

Good reliable quality item

By Tim on 03/08/23

The price and service offered by gunprime is the best

By Gerry Joyce on 02/01/23
Gunprime is an Awesome Dealer

I purchased a Mossberg 590 Shockwave in 20 Gauge.
After completion of the sale the firearm was quickly sent
to my local FFL where I took position of it.
The web site was easy to negotiate and it shipped within 3 business days.
I had it in less than a week. The firearm was in Perfect condition.
Pricing was better than anywhere I could find that sold this firearm.
I will definitely use GUNPRIME again and will tell friends and family about it also...

By senior on 01/25/23
good service,advise,shipping.

just got it,i like shotguns,safety is very hard to use.

By Jerry Coleman on 10/16/22
Great home protection

This is a great gun for what I want, I have three of them in different gage’s and it took awhile to find the 20 gage and now my collection is complete. The price was fair and I got it fairly quickly.

By John on 08/18/22
Great service & turn-around time from GunPrime, Thank you!

Haven't shot yet...

By Gregory A. on 04/26/22
Best Price, Great Gun and Fast Service

I chose the 20 gauge Mossberg Shockwave as the 12 gauge has significantly more recoil. Also, I've always been partial to the 20 gauge as it is more of a 'fun' chambering, as opposed to the 12, which more of a 'work' chambering, such as police, military, I also have 12 gauge pump shotguns and know how strong the recoil is, even with birdshot. I haven't decided if the Shockwave is a novelty firearm, a viable home defense tool, a badass weapon that's fun to shoot, or all of the above. I will make a leather holster for it, possibly cross draw and/or have a dangling option much like a sword scabbard.
Gunprime had the best price and shipping was very quick. I highly recommend both the 20 gauge Mossberg and Gunprime,

By Hagar67 on 04/11/22
Pleased Customer

GunPrime had in stock the 20 gauge Mossberg Shockwave I was looking for and it was delivered promptly to the FFL Dealer I designated. Quality Service. This gun shoots nicely and doesn't have the kick of a 12 gauge. It will serve the intended purpose of home defense. Thanks GunPrime!

By Hagar67 on 04/11/22
Pleased Customer

GunPrime had in stock the 20 gauge Mossberg Shockwave I was looking for and it was delivered promptly to the FFL Dealer I designated. Quality Service. This gun shoots nicely and doesn't have the kick of a 12 gauge. It will serve the intended purpose of home defense. Thanks GunPrime!

By Buck Conner on 04/09/22
Purchase, Delivery and Tracking

The Mossburg Shovewave 20 gauge was purchased for lighter recoils than a 12 gauge because of my health issues. This weapon will be for home defense and with a couple of accessories like sling swivel, a larger front sight, bigger safety it filles what is needed.

This shotgun couldn't be found in the state of Utah (back orders), I went to the Internet and found Gunprime's website. One call and the gun was ordered and sent to my local FFL dealer. That's where the problem started as that dealer doesn't except the short style shotguns (company policy - nothing was mentioned, and the gun comes up missing). My firm returned the gun to Gunprime (no tracking number was provided). Gunprime found the tracking information and once redelivered resent to another dealer. Thanks to Gunprime for all their help in filling what was needed.

By Teddy ab on 03/14/22
Shockwave is the Craze

Funny story, I never intended to purchase a 20 gauge shotgun. I bought the ammo ignorantly, got upset with what I thought was inferior ammo to a 12 gauge. Thus I lead on my adventure to acquire the perfectly paired Shockwave.

This thing is a Perfect 20g gauge pump of fun for any age or size shooter. Great for the wife and kids, grandkids and beginners who aren’t expecting the shotgun recoil and those who are over prepared for what fun is to come.

Gunprime’ display, photos, explanation of this product followed up with great customer service of receipt and quick shipping to my trusted FFL within their database made this purchase a 3 day breeze. I’m impressed and will certainly recommend.

By DANNY MATRIX on 01/17/22


By bill on 12/21/21
Good price for a hard-to-find gun

Very happy with my purchase: good price, fair and fast shipping

By dirt farmer on 11/13/21
Best shotgun for self-defense at home

Gunprime was great in having the 20 guage shockwave at a reasonable price and getting it to me in a timely fashion. I love this shotgun and it will replace my Remington Model 1100 for self defense at home. Lightweight,short and fun to shoot. Less recoil for the wife in the 20 guage. I am recommending this shotgun to all my friends and relatives for home defense.

By Glade Runner on 11/02/21
Exactly what I was looking for

This Mossberg shotgun also comes in a 20 ga for us smaller ladies. Comfortable grip, lightweight and packs a punch!

By dirt farmer on 09/30/21
Fun to shoot.

Great shotgun for self-defense. Short,lightweight,low recoil&fun to shoot. I love this shotgun.

By cwahine on 09/24/21
Great buy!

Been looking for this one for a while and found it at GunPrime for a great price! Purchased, transferred and picked up within 2 weeks! Status notifications at every step so I knew where my order was during the entire process. I would definitely order again from GunPrime and will recommend this site to friends and family.

By Grave-Bait of Wiked Wood on 09/22/21

This thing is phenomenal. i was out cutting small trees down with it. now i want to get it in 12, form 1 it, and put a stock on it, you really cant go wrong with this thing

By Ronald Ledford on 07/15/21

Best short gun that I have shot.

By Aaron Verrett on 04/20/21
Had to have been shipped by rocket

I couldn’t believe how fast it came. Definitely pleased and will purchase again through gunprime!!!

By WRS57 on 02/12/21

Swift and easy transaction five star

By Great Online Purchase Experience on 02/11/21
Was very hesitate to make a purchase across the country, but couldn’t have been happier.

Within 3 hours of purchase UPS had this package and it was on its way. Purchased for home defense, thankfully have not had to use it, and hopefully never will. I like the compactness of this weapon, especially for home defense. I am very pleased with this gun, and would definitely buy again. Have recommended it to friends.

By Mike, 30 years of law enforcement on 01/22/21
Gunprime ROCKS!

I'd been searching for over a year for a Mossberg 590 Shockwave in 20 ga when a friend told me about Gunprime.com. I checked it out and Boom! there it was. I bought mine for a great price and they shipped it to my FFL in record time. I can't describe how happy I am with the service I received from Gumprime. They're going to be my go-to site in the future. My wife and daughter are super impressed with this model Mossberg in 20 ga. I'll probably have to buy another for them.

By Retired in Las Vegas on 12/29/20
Simply AWESOME, Read on.......

First off, the "service" I received from GunPrime is second to none. From the selection, to the purchase, to the shipping to a local FFL, the tracking, the notification everything was PERFECT, effortless with zero worries. Even the after sales follow-up was first class.
The 590 Shockwave in 20 gauge is the perfect home defense weapon. It's light enough for my 95 pound wife to handle.It's 26.5 inches long... so you can get around inside the house with it.It does not take long to get used to the "grip" of the 590 Shockwave.Add a Picatinny top rail and a laser pointer and you are ready to neutralize any threat to your family or home.The release lever is easy to work, the safety being in the middle can be released with either hand and SHOWS if it's on or off.The feeding is flawless, no mistakes, no disappointments. Thanks Gunprime, you have a lifelong customer. FYI I was NOT paid for this Product Review.

By Ally on 06/23/20
Exactly what I wanted and expected

This has been on my wish list for a very long time and super glad I finally "pulled the trigger"! The 20 ga has all the functionality and knockdown power I want but with a lot less recoil. I bought this predominantly as a home defense weapon and it's fun as hell out on the range also. Shoulda bought it years ago . . . I do wish the 20 gauge offered more configuration options and accessories, but I knew that before I made the purchase. In addition, Gunprime made the purchase very easy and the price was right

By alex on 01/15/18

5 *s for gunprime's painless communication and s/h. Ordered 1/5, to my FFL on 1/12! Filled out the 4473 1/15 & took it straight out to the desert! Didn't clean it - out of the box & on the firing line. Fed it everything from 7.5 to #1 (my HD Rio RB209) to 3/4 oz slugs - every load cycled with 0 issues. IMHO #1 buck in a 20ga is an outstanding combo for HD (especially for my wife) - but - what REALLY makes the package lethal is the addition of a rail and a Laserlyte CM-MK4. This center mass laser turns it into a point-n-shoot from ANY position CQB/HD no-brainer DRT weapon!!! Very highly recommended!!!

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