Keep your striker-fired pistol running reliably with Firing Pin Spring Cups (Part #100002678)—small but essential internal components that help support proper firing pin (striker) spring assembly, consistent operation, and dependable ignition. If you’re maintaining a hard-use handgun, replacing worn small parts, or building a well-rounded spare-parts kit, these spring cups are the kind of low-cost, high-value components that help prevent downtime and keep your firearm operating smoothly.
If you’re searching for firing pin spring cups, striker spring cups, or part number 100002678, this is the correct replacement part to have on hand for routine maintenance and service work on compatible platforms.
What Firing Pin Spring Cups Do (and Why They Matter)
In many striker-fired designs, spring cups (also called spring retainers or spring spacers depending on platform) are used to capture and retain the firing pin spring in the correct position on the firing pin/striker assembly. Their job is simple but critical: keep the striker spring properly seated and functioning as designed.
When spring cups are damaged, worn, incorrectly installed, or missing, it can lead to problems such as:
Inconsistent striker spring retention
Unreliable ignition or light primer strikes (in some cases)
Assembly issues during maintenance or parts replacement
Premature wear on striker assembly components
Reduced confidence in function during training or defensive use
These parts may be small, but they support the reliability of one of the most important cycles in your firearm: ignition.
When You Should Replace Spring Cups
Firing pin spring cups are often replaced when:
A cup is cracked, chipped, or deformed during disassembly
You’re refreshing an older striker assembly with new wear parts
You’re installing a new striker spring and want fresh retainers
You’re troubleshooting inconsistent ignition and eliminating variables
A cup was lost (they’re tiny and easy to misplace)
For many shooters, replacing spring cups during routine spring service is smart preventative maintenance—especially for pistols that see frequent training.
Perfect for Maintenance Kits and Armorers
The Firing Pin Spring Cups 100002678 are ideal for:
High-round-count pistols used in classes and training
Competitive shooters who keep spares to avoid match-ending failures
Armorers and gunsmiths servicing multiple handguns
Owners who do their own detail stripping and internal parts cleaning
Anyone building a “just in case” parts kit for range or duty use
Because these cups are small and inexpensive, they’re one of the best parts to keep in reserve—especially if you don’t want a lost or damaged cup to stop you from reassembling your pistol.
Reliable Function Starts with Proper Small Parts
It’s easy to focus on barrels, triggers, and optics, but the truth is that reliability often comes down to the smallest components. Spring cups are a perfect example: when they’re correct and properly installed, you never think about them. When they’re missing or damaged, your firearm may not run the way it should.
Having the correct part number ensures:
Proper fit on compatible striker assemblies
More consistent spring retention
Easier, smoother reassembly during maintenance
Greater confidence that your internal setup is correct
Installation Notes (General Guidance)
Because firing pin spring cups are internal striker components, installation typically involves disassembling the striker assembly. In general:
Verify the firearm is unloaded before any work
Use proper tools and eye protection (springs can be under tension)
Follow platform-specific armorer procedures
After reassembly, perform a complete function check
If you’re not comfortable working with striker assemblies, a qualified gunsmith can install and verify function quickly.
Product Details and SEO Search Terms
For quick identification and ordering:
Product Name: Firing Pin Spring Cups
Part Number: 100002678
Common searches: 100002678 firing pin spring cups, striker spring cups replacement, firing pin spring retainer cups, spring cups for striker assembly
Small Part, Big Reliability Upgrade
Whether you’re doing routine maintenance, replacing worn components, or building a spare parts kit that keeps you prepared, Firing Pin Spring Cups (100002678) are an essential internal part that supports proper striker spring assembly and consistent ignition performance. Keep your pistol running right by making sure the small parts are just as dependable as the big ones.
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