Magpul Mossberg SGA Stock and Forend Kit 590/590A1


  • Reinforced polymer construction
  • Increased length for improved pump manipulation
  • Does not overlap receiver for sidesaddle compatibility
  • M-LOK slots for direct attachment of accessories
  • Installation wrench included


UPC: MAG490 SKU: AITMAG494-KIT1 Categories: , Brand:

Magpul Mossberg SGA Stock and Forend Kit

If you have been looking for an all-in-one kit for your Mossberg 590 / 590A1 series shotgun then look no further. The solution is our Magpul Mossberg SGA Stock and Forend Kit! We offer you this kit so you know after buying this you can install the stock and forend on your shotgun and be ready for whatever life throws at you.

The Magpul SGA Stock - MAG490

The SGA Buttstock is an ambidextrous, user-configurable buttstock designed to add much-needed adjustability to the tried-and-true Mossberg 500 / 590 / 590A1 12-gauge series of shotguns. This SGA Buttstock will also fit the Maverick 88. Magpul manufactures the highest quality firearm parts and lifestyle accessories which are relied upon by the nation’s top law enforcement and military personnel. Its features include a spacer system for length of pull adjustment, improved grip ergonomics, a recoil-reducing butt-pad, and optional cheek risers for use with optics/raised sights and other accessories.

The Mossberg SGA brings Magpul design and engineering to another classic American firearm.  Available in Black, Flat Dark Earth, and Stealth Gray you can adapt to the mission at hand.


The Magpul SGA is a highly configurable buttstock designed for the Mossberg 500 series shotguns. With improved ergonomics, this design offers a tailored fit. Featuring a spacer system for length of pull adjustment, a recoil-reducing buttpad, and optional interchangeable cheek risers. You can also buy several slings and attachments to this buttstock to fit it to your needs.

Installation of the SGA Buttstock

There is one screw to attach the Magpul SGA stock to the shotgun and requires no modifications or fitting. With the included allen wrench, installation is extremely simple and straightforward. It takes less than 10 minutes to assemble! Whether you are a beginner or a seasoned veteran, this stock will certainly give you an “Unfair Advantage” over the competition.

Made in the USA by Magpul, a company with a long history of quality!

The Magpul MOE M-LOK Forend - MAG494

The Magpul MOE M-LOK Forend is a drop-in replacement for the standard Mossberg 590/590A1 12 gauge shotguns, featuring an extended length and front/rear hand stops for improved weapon manipulation. Now updated with M-LOK slots for compatibility with all M-LOK accessories, this forend adds modularity to the proven Mossberg 500 series platform for sporting use, home defense, or on duty.

Available in Black, Flat Dark Earth, and Stealth Gray you can adapt to the mission at hand.

Note: The optional heatshield on the Mossberg 500 series shotgun will have to be removed. It is not compatible with this forend.

Benefits of the Magpul Forend Include

  • Increased length for improved pump manipulation
  • Rugged Polymer and 9 M-LOK Slots
  • Reinforced Polymer construction and M-LOK slots for direct attachment of accessories.
  • Narrow profile reduces snagging
  • Does not overlap receiver for sidesaddle compatibility

What is in the package?

  • Magpul SGA Stock - MAG490 for the Mossberg 590/590A1 series shotguns
  • Magpul MOE M-LOK Forend - MAG494

This Magpul Mossberg SGA Stock And Forend Kit is not compatible with the following shotguns

  • 14" 590 Shockwave
  • Mossberg 500
  • Mossberg 535
  • Maverick 88 and AOW models.

About Magpul

Magpul was founded in 1999 with the intent of developing a simple device to aid in the manipulation of rifle magazines under stress. The company name comes from this original product, called the Magpul. Over the last twenty-plus years, Magpul has continued to grow and develop, following the same mission and processes and focusing on innovation, simplicity, and efficiency. Unnecessary complexity and expensive construction are the hallmarks of mediocre design. It is almost always easier to design a product that is complicated, confusing, and expensive rather than simple, intuitive, and affordable. Although it is more difficult, Magpul has chosen to take the latter of these two approaches to product development. From the onset of every project, Magpul uses a list of mission-driven requirements to dictate design, material construction, and manufacturing methods that will be most efficient without sacrificing quality or performance. The goal of the design itself is to be both simple and intuitive. By incorporating ergonomic considerations, a proper user interface, and subtle visual and tactile features, the product itself should actually instruct the user about its operation and function. Although every Magpul product comes with clear, concise installation and usage instructions, our aim is to design products so self-explanatory that instructions become unnecessary.

Export Notice

The Magpul Mossberg SGA Stock and Forend Kit is controlled for export by the Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements.

As part of the express consideration provided for receipt of AIT Arms goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by AIT Arms in violation of U.S. law is prohibited.

Customers acquiring controlled goods, technical data and/or services from AIT Arms shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws.  (See AIT Arms Shipping Policy for more information).

Safety Notice

Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. AIT Arms shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.

Additional information

Weight 52 oz
Dimensions 14 × 10 × 2 in

Black, FDE, Grey


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