Looking to put Magpul SGA stock and forend on my Mossberg 590S 20". I've seen a couple of videos on YouTube and it looks like an quick and easy process without any modifications needed. Spoke with Magpul and they told me the 590/500 Magpul products are not compatible with my 590S. Forend would need a certain part replacement. The same with the stock. They told me Mossberg made some crazy changes on this shotgun model that causes the problem. Is this true?

Question

Looking to put Magpul SGA stock and forend on my Mossberg 590S 20".  I've seen a couple of videos on YouTube and it looks like an quick and easy process without any modifications needed.  Spoke with Magpul and they told me the 590/500 Magpul products are not compatible with my 590S.  Forend would need a certain part replacement.  The same with the stock.  They told me Mossberg made some crazy changes on this shotgun model that causes the problem. Is this true?

Jason L. · Answer

Seems that MagPul may be right.
The Mossberg 590 and 590S are both pump-action shotguns, but the 590S has some design changes that make it more flexible and versatile: 
Shotshell length
The 590S can use 1.75 in, 2.75 in, or 3 in shotshells, and you can load any combination of these lengths. Shorter shell lengths increase the 590S's capacity. 
Optic-ready
The 590S has an optics mount plate that works with micro concealed carry sights, and you can also mount a traditional rail on top. 
Sights
The 590S has ghost-ring rear sights and a blade front sight, which some say make it easier to acquire your target. 
The 590S also has a redesigned elevator and bolt slide, an energy-absorbing bumper, and standard features like dual extractors, twin action bars, and ambidextrous safety.

Ed C. · Answer

Hi Chuck, I'm sure MagPul should know their own products, but there seems to be a contradictory response from Mossberg.
Mossberg says otherwise - "Thank you for inquiring with us today. The 590S stock is compatible with the same stocks that are compatible with all the 590, 590A1, 500, and maverick firearms within gauge. So yes the "SGA STOCK -MOSSBERG 500/590/590A1" will fit the 590s"
So do you believe MagPul or Mossberg?
It may be true that the forend on the 590S is different, but the stock should work.

James G. · Answer

Hi Chuck and welcome. I would check the return policy of wherever you purchase just in case things don't actually work out. Buds has a 10 day return policy. Cheers, stay safe and enjoy!

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