Description
Snap caps are one of those small pieces of gear that end up earning their keep every time you handle your shotgun, and Pro-Shot built these to pull a little extra weight. Each cap in this two-pack pairs a precision brass head with a spring-loaded firing pin, so when you dry-fire or let the tension off your cocking springs for storage, the firing pin lands on something built to take the hit instead of slamming into an empty chamber. Letting that spring tension off during long-term storage is something a lot of gunmakers recommend, and it can help keep the action working the way it should for years.
What Sets These Pro-Shot Snap Caps Apart
The cotton mop is the piece that separates these from a plain dummy round. It fits right up into the chamber area with natural lanolin already worked into the fibers, giving you a barrier against surface rust in a spot that tends to get overlooked. If you want a little more protection, add a few drops of oil to the mop and let it sit. When the mops eventually wear out, they're replaceable, so the brass heads keep going long after the cotton has done its time.
Fitting the 12 Gauge Snap Caps to Your Shotgun
These are threaded to the American #5/16-27 standard and are made for over-and-under and side-by-side 12 gauge shotguns. That threading is also what lets you swap the mops down the road. Made in the USA, the brass heads have a clean, polished look that makes them easy to spot and easy to tell apart from live shells at a glance.
Whether you're working on trigger control at home, tucking a favorite bird gun away for the off-season, or just want to keep the chamber clean between range trips, this pair covers all three jobs without any fuss. Toss them in your cleaning kit and they'll be there when you need them.
Key Specifications
- Manufacturer: Pro-Shot
- Manufacturer Part Number: 12SC
- UPC: 709779600618
- Gauge: 12 Gauge
- Quantity: 2 Pack
- Head Material: Brass
- Mop Material: Cotton with natural lanolin
- Firing Pin: Spring-loaded
- Thread Pattern: #5/16-27 (American standard)
- Compatibility: Over-and-under and side-by-side shotguns
- Replaceable Mops: Yes
- Origin: Made in USA
What’s Included
- 2 Pro-Shot 12 gauge brass snap caps with cotton mops
Frequently Asked Questions
What are the Pro-Shot 12 gauge snap caps used for?
They serve three main jobs: cushioning the firing pin during dry-fire practice, releasing cocking spring tension for safe long-term storage, and protecting the chamber from rust with a lanolin-treated cotton mop. The brass head absorbs firing-pin impact so you're not dry-firing on an empty chamber. It's a handy all-in-one for keeping a shotgun healthy between uses.
Will these snap caps fit any 12 gauge shotgun?
They're designed for over-and-under and side-by-side 12 gauge shotguns and use the American #5/16-27 thread. The cotton mop is sized to sit up in the chamber area of those break-action guns. If you run a semi-auto or pump, a standard 12 gauge dummy round is usually a better match.
Can I add oil to the cotton mop for more rust protection?
Yes. The mop already comes with natural lanolin worked into the fibers, but you can add a few drops of a gun oil or CLP for an extra layer of protection in the chamber. Just don't soak it, a light application does the job.
Are the mops on these Pro-Shot snap caps replaceable?
They are. When a cotton mop eventually wears out or gets grimy, you can swap it for a fresh one and keep using the brass heads. That's what makes these a longer-term investment compared to a throwaway dummy round.





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