Description
If you've been running your Mossberg 500 without a sling, this is one of the simplest fixes out there. Uncle Mike's built this QD Mag Cap Swivel Set to give you front and rear attachment points without altering the gun itself. The front swivel base comes already installed on a replacement magazine cap, so you unscrew the factory cap, thread this one on, and you're halfway done. The rear uses a 3/4-inch wood screw base that anchors into the buttstock.
What Makes the Mag Cap Swivel Set Worth It
The whole appeal here is that nothing permanent happens to the receiver or barrel. The cap is a direct swap for the original, and the wood screw base is the same style of stock stud you'll find on plenty of factory guns. Everything is steel with a blued finish, so it blends in with the classic Mossberg look instead of standing out. It's a tidy, low-profile setup that doesn't scream aftermarket.
Tri-Lock Swivels That Stay Put
The kit ships with two 1-inch Super Swivels using Uncle Mike's Tri-Lock retention. That 1-inch loop is the standard size, so just about any hunting or range sling you already own will thread right on. The quick-detach design means you can pop the sling off when you want the gun bare and click it back on when you're heading out. Folks who've installed these say the instructions are easy to follow and the job isn't hard, though the cap retaining washer can take a little patience to seat.
Built for Field Carry and Range Days
This is the kind of upgrade that pays off the first time you're hauling gear through the field or standing a long shift at the range. A Mossberg 500 gets heavy on the arm after a while, and having a sling frees up your hands for everything else. Between the durable steel build and the simple bolt-on install, it's an easy call for anyone who wants sling capability without touching a drill.
Key Specifications
- Manufacturer: Uncle Mike's
- Manufacturer Part Number: 18102
- Model: Quick Detach Mag Cap Swivel Set
- UPC: 043699181025
- Fits: Mossberg 500 (12 Gauge)
- Loop Size: 1 inch
- Material: Steel
- Finish: Blued
- Retention: Tri-Lock Quick Detach
- Product Type: Mag Cap Swivel Set
- Buttstock Base: 3/4" Wood Screw
What’s Included
- Replacement magazine cap with swivel base pre-installed
- 3/4" wood screw buttstock swivel base
- Two 1" Super Swivels with Tri-Lock retention
- Installation instructions
Frequently Asked Questions
Will this swivel set fit my Mossberg 500?
Yes, this kit is made specifically for the 12 gauge Mossberg 500 platform. The replacement magazine cap is designed to thread on in place of the factory cap, so fitment is a direct swap. Many owners also run these on the Maverick 88 since it shares the same design.
Do I need a gunsmith to install the Mag Cap Swivel Set?
No, this is a straightforward do-it-yourself job. The front swivel base is already installed on the replacement cap, so you just unscrew the old cap and thread on the new one. The rear base is a wood screw that goes into the buttstock, and the whole thing comes with instructions.
What size sling works with these swivels?
The two Super Swivels use a 1-inch loop, which is the most common sling width out there. That means almost any standard hunting or range sling will attach without an adapter. The quick-detach design also lets you take the sling off and back on whenever you want.
Does installing this permanently change my shotgun?
No, the whole point of this set is to add sling points without altering the firearm. The magazine cap is a reversible swap, and you can always put your original cap back on. Only the rear wood screw base makes a small hole in the stock, which is standard for any stud-style swivel mount.




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