If your Springfield SA-35 or FNX-45 magazine isn’t locking the slide back on empty, or you’re seeing sluggish cartridge lift during the feed cycle, the fix is here. The Apex Extra Power Magazine Spring Set delivers consistent, reliable tension where it counts. Priced at $25, this is a direct upgrade for shooters who want their gear to run without fuss or failure.
These springs are made from Rocket Wire—a premium material chosen for high-cycle, high-demand applications. That means you get consistent spring force over thousands of rounds, not saggy performance after a few range trips. Each spring is manufactured in the USA to Apex’s specifications by a specialized spring house. No overseas shortcuts, no guesswork.
What it does:
The Extra Power spring improves cartridge lift during feeding and ensures your slide locks back positively when the magazine runs dry. If you’ve had weak slide lock or nose-diving rounds, this spring set addresses both issues without requiring a complete magazine swap.
Confirmed fitment (tested by Apex):
- FNX-45 magazines – Works specifically with an Apex Magazine Extension installed.
- Apex 19-round magazines for the SA-35 Series Pistols.
Important note: These springs are not recommended for the Apex 17-round magazine. Stick with the 19-round version for proper function.
Why this matters for you:
If you’re buying mags in bulk or stocking spares for competition, duty, or heavy range use, stock springs wear out. Replacing them with a higher-tension spring extends the life of your existing magazines. At $25 for a set, it’s cheaper than buying new mags and gives you more reliable performance from what you already own.
Specs at a glance:
- Material: Rocket Wire (high-tensile, fatigue-resistant)
- Manufacturing: USA, made to Apex specification
- Application: SA-35 (19-round Apex mags) and FNX-45 (with Apex extension)
- Price: $25 per set
- Category: Springfield, SA-35, Magazines
No hype. No fluff. Just a better spring that makes your mags work like they should—every time.
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