Description
The Magpul QD Sling Swivel is one of those small pieces of kit that quietly makes your whole setup better. Push the button, seat it in a QD socket, and you've got a secure sling connection. Push it again and your sling comes right off. It's built for slings up to 1-1/4" wide and works with any standard quick-detach socket, so it slots right into the kind of setup most folks are already running.
What Makes the MAG540 Worth Bolting On
Magpul went with case-hardened steel and a manganese-phosphate finish here, which is the same corrosion-resistant treatment you'll find on plenty of duty-grade hardware. That means it holds up to sweat, weather, and the general abuse that comes with regular range time or field use. The swivel seats tight in the socket with no wobble and stays quiet, which anyone who's dealt with a rattling sling mount will appreciate. It's a simple part, but the build quality is exactly what you'd expect from Magpul.
Fitting the QD Sling Swivel to Your Rifle
This swivel plays nice with Magpul Type 1 and Type 2 QD sling socket kits, plus the QD sockets built into stocks like the UCS, DT, MOE SL, and UBR Gen2, among others. If your AR-15, M4, or similar platform already has QD points, it's a direct fit. Pair it with a Magpul MS1 Sling for a dedicated two-point setup, or run it with the MS1/MS4 Adapter if you want a convertible two-to-one point rig you can reconfigure on the fly.
It's made in the USA and it's about as no-nonsense as gear gets. If you're adding quick-detach capability to a sling that didn't come with it, or replacing a swivel that's seen better days, this is the go-to piece that just works.
Key Specifications
- Manufacturer: Magpul Industries
- Manufacturer Part Number: MAG540-BLK
- Model: Sling Swivel
- UPC: 873750010854
- Color: Black
- Style: Quick Detach (Push-Button)
- Product Type: Sling Swivel
- Webbing Width: Fits up to 1.25" (1-1/4") webbing
- Material: Case-Hardened Steel
- Finish: Manganese Phosphate
- Compatibility: Standard QD sling attachment points, MS1 Sling, MS1/MS4 Adapter
- Country of Origin: USA
What’s Included
- Magpul MAG540-BLK QD Sling Swivel
Frequently Asked Questions
Will the Magpul QD Sling Swivel fit my rifle's QD sockets?
It works with any standard quick-detach sling attachment point, so if your stock, rail mount, or receiver has a QD cup, it'll seat right in. Magpul specifically notes compatibility with its Type 1 and Type 2 QD socket kits and the QD sockets built into stocks like the UCS, DT, MOE SL, and UBR Gen2. As long as you're running a standard QD socket, you're good to go.
What sling width does the MAG540 handle?
The loop is built for slings up to 1-1/4" (1.25") wide, which covers the vast majority of two-point and convertible rifle slings on the market. If your sling is narrower than that, it'll still thread through fine. This is the most common webbing width for tactical and range slings.
Do I need a Magpul sling to use this swivel?
Nope. The swivel fits any 1.25" webbing and any standard QD socket, so it works with a wide range of slings from different brands. That said, it pairs seamlessly with the Magpul MS1 Sling for a two-point setup or the MS1/MS4 Adapter for a convertible two-to-one point configuration if you want to stay in the Magpul ecosystem.
Is the steel construction going to hold up outdoors?
Yes. It's case-hardened steel with a manganese-phosphate finish, which is a proven corrosion-resistant treatment used on plenty of hard-use firearm hardware. It's designed to shrug off sweat, moisture, and rough handling in the field or at the range.





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