Description
The Magpul Forward Sling Mount solves a problem every 590A1 owner runs into eventually: there's no clean forward attachment point for a sling. This clamp-on mount grabs onto the barrel and magazine tube up front, giving you a solid anchor without drilling, tapping, or any permanent changes to your shotgun. It's cut specifically for the A1's heavy-walled barrel and factory extended magazine tube setup, so the fit is snug and purpose-built rather than a one-size-fits-all guess.
What the 590A1 Forward Sling Mount Works With
Versatility is the name of the game here. The mount has a QD cup on both sides and accepts Push-Button QD sling swivels along with one-point clip-in attachments like the Magpul Paraclip, HK hook, and ITW MASH hook. That means you can set it up with two QD points, or run a QD on one side and a hook on the other depending on how you like to carry and shoulder the gun. It works in either a right-handed or left-handed configuration too, so lefties aren't left out.
Built From Steel That Holds Up
This isn't a polymer part. The Forward Sling Mount is made from precision-cast steel finished with a QPQ salt bath nitride (Melonite) treatment, which gives it serious resistance to wear, scratches, and corrosion. Users consistently note the fit and finish is exactly what you'd expect from Magpul, and the mount includes silicone pads that keep it from marring your barrel's finish once it's clamped down.
A Few Things Worth Knowing Before You Install
Installation is straightforward and comes down to a single center screw, though it's worth mentioning the hardware takes a 9/64 inch hex bit, which is the same size a lot of AR-15 owners already have in their kit. The instructions are clear and everything you need to mount it is in the box aside from the wrench. Keep in mind this is a dedicated fit for the 590A1 with the factory extended magazine tube and will not work on other Mossberg models. Made in the USA.
Key Specifications
- Manufacturer: Magpul Industries
- Model: Forward Sling Mount SGA
- Manufacturer Part Number: MAG493-BLK
- UPC: 873750008592
- Fitment: Mossberg 590A1 with factory extended magazine tube
- Material: Precision-cast steel
- Finish: QPQ salt bath nitride (Melonite)
- Color: Black
- Attachment Type: Push-Button QD swivels and one-point clip-in hooks
- Configuration: Ambidextrous, right or left-hand setup
- Installation Tool: 9/64 inch hex bit
- Product Type: Sling Mount
- Country of Origin: Made in USA
What’s Included
- Magpul Forward Sling Mount (steel body)
- Mounting hardware (center clamp screw)
- Silicone protective pads
- Installation instructions
Frequently Asked Questions
Will the Magpul Forward Sling Mount fit any Mossberg shotgun?
No, this is a dedicated fit for the Mossberg 590A1 with the factory extended magazine tube. It's designed around the A1's heavy-walled barrel and that specific tube configuration, so it won't work on standard 500, 590, or other Mossberg models. If your shotgun isn't a 590A1 with the extended tube, you'll want a different mount.
What tool do I need to install the Forward Sling Mount?
You'll need a 9/64 inch hex bit to tighten the single center clamp screw. That's the same size found in a lot of AR-15 tool kits, so plenty of owners already have one on hand. Everything else you need comes in the box, including the silicone pads that protect your barrel finish.
Can I run both a QD swivel and a hook at the same time?
Yes. The mount has a QD cup on both sides, so you can set it up with two QD points, or a QD on one side and a clip-in hook on the other. It accepts Push-Button QD swivels along with the Magpul Paraclip, HK hook, and ITW MASH hook. It also installs in either a right or left-hand configuration.
Is this Magpul mount steel or polymer?
It's precision-cast steel, not polymer, finished with a QPQ salt bath nitride treatment for strong corrosion and wear resistance. That construction gives it the durability you want on a hard-use shotgun. Owners regularly point to the metal build and clean fit and finish as standout features.





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