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SGA® AMBIDEXTROUS BUTTSTOCK FOR MOSSBERG® 500/590 Reviews & Ratings

The SGA Stock 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. 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, Stealth Gray and Orange to adapt to the mission at hand.

Made in the USA.

FEATURES

Spacer-adjustable lop in 1/2" increments from 12.5" to 14.5"
Recoil-reducing butt-pad
Integral right/left 1.25" sling loops

SPECS

Platform: Shotgun
Compatibility: Mossberg® 500/590/590A1 12-gauge
Butt-Pad Dimensions: 1.5 x 5.0 in.
LOP Adjustment Range: ~12.3-14.3 in.
Weight: 1.5 lbs. (with two Spacers installed)
Width of Butt, max: 1.5 in.

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5 Stars

94%

4 Stars

3 Stars

2 Stars

1 Stars

Reviews Summary

Customers rave about the SGA® Ambidextrous Buttstock, praising its comfort, adjustability, and solid construction. Many found installation straightforward and appreciated the ergonomics, enhancing their shooting experience. However, some raised concerns about minor installation challenges and a lack of certain features, like folding capabilities. Overall, it's a highly regarded upgrade for shotguns.

What Reviewers Are Saying

Ease of Installation

70%

Many reviews highlight how easy the buttstock is to install, with some users reporting the installation takes only a few minutes. While a couple referenced minor issues with existing parts, the majority found it straightforward and user-friendly.

Comfort and Ergonomics

80%

Comfort is a recurring theme, with numerous reviewers noting the stock's well-engineered design enhances shooting comfort and reduces felt recoil. Users appreciate the grip and cheek weld, making longer shooting sessions more enjoyable.

Adjustability

75%

The adjustable length of pull is a significant feature praised by many. Reviewers noted that it accommodates various body types and shooting styles, providing versatility to fit individual preferences and clothing.

Quality of Build

85%

The overall build quality of the buttstock received high marks, with users commenting on its durability and solid construction. Many praised Magpul's reputation for quality, claiming the stock feels robust compared to cheaper alternatives.

Minor Installation Challenges

20%

Some reviews pointed out minor annoyances during installation, such as difficulties with the provided tools and parts that might complicate trigger group removal for cleaning. A few users suggested improvements for future models.

Overall Satisfaction

90%

Overall, customers express a high level of satisfaction with the SGA buttstock, indicating it's a worthwhile investment for upgrading shotguns. Many mentioned they would opt for this product again, reflecting strong loyalty to the brand.

Customer Photos & Videos

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Feels solid.

Feels solid when shooting. Awesome product

Would you recommend this? Yes, I would recommend to a friend

by David Jones on March 20, 2026

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Making a Shockwave useful

The zero dollar tax stamp for an SBS prompted my purchase of this product. The high quality of Magpul products and ease of installation helped the decision.

Would you recommend this? Yes, I would recommend to a friend

by David Keith on February 28, 2026

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Was this review helpful? 2

Brownells and Magpul….a winning team!

Thank you for the excellent service. This is my fourth Magpul stock, two on Mossbergs and one each on Beretta and Remington. They all make those shotguns so much more user friendly for me. You guys are Aces!

by Paul D. Herbst on October 02, 2025

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Always reliable

Brownells offered a good price and fast delivery. Magpul offers an improved shooting experience. The sun rises in the east,…

Would you recommend this? Yes, I would recommend to a friend

by Scott Dalrymple on August 13, 2025

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Nice stock upgrade

Easy to install on a Maverick 88. Good option for adjusting the length of pull.

Would you recommend this? Yes, I would recommend to a friend

by GLENN MCNAIR on August 08, 2025

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Was this review helpful? 3

Perfect fit on Mossberg Maverick 88

Fits like a glove on my 17-year old Mossberg Maverick 88! The installation is a little tedious but worth it. My very first firearm purchase as a young adult just got a much needed upgrade. Thank you Brownells for having this in stock!

Would you recommend this? Yes, I would recommend to a friend

by Roy Buendia on February 01, 2025

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Was this review helpful? 4

Magpul stock

Awesome stock

by GREG TRITHART on October 25, 2024

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Added a little color to my POF Tombstone

I acquired a POF Tombstone. It uses the Magpul stock. I replaced the stock and added the Magpul rail colors to upgrade it from being all black.

Would you recommend this? Yes, I would recommend to a friend

by Frederick Stecher on June 02, 2024

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Was this review helpful? 1

Great stock

This stock is a night and day change on how my shotgun fits me. I highly recommend this.

by DOUGLAS WALKER on February 19, 2024

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Finally...

An 870 stock that can fit shorter armed adults. Lets me grasp the forend at the front where the surefire light pressure switches are, instead of the very back of the forend where I had to hold with the standard 870 butt stock lengths.

by MARK HOBBS on November 27, 2023

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Was this review helpful? 1