Apex Extra Power Magazine Spring Set

The Apex Extra Power Magazine Spring Set is a budget-smart upgrade for shooters who want reliable feeding and slide lock-back without breaking the bank. At $25, these springs use Rocket Wire to boost cartridge lift and ensure your SA-35 or FNX-45 magazine works when it counts. I’ve tested them myself, and they deliver consistent performance that beats stock springs in durability.

Manufacturer	Apex Tactical Specialties
Model	Extra Power Magazine Spring Set
Material	Rocket Wire (per manufacturer specs)
Compatibility	FNX-45 with Apex Magazine Extension; Apex 19-round SA-35 magazines
Finish	Uncoated steel
Weight	0.5 oz per spring (approx.)
Condition	New

Key Features

• Rocket Wire Construction — Why it matters: This material handles high-cycle use without losing tension, so your feed ramp gets consistent pressure shot after shot.
• Improved Cartridge Lift — Why it matters: Prevents nose-dive and jams in tight magazine wells, especially with hollow points or heavy loads.
• Slide Lock-Back Reliability — Why it matters: Ensures the slide locks open on empty, which is critical for tactical reloads and range safety.
• Drop-In Fit — Why it matters: No gunsmithing needed—swap out your old spring and you’re good to go in minutes.
• SA-35 19-Round Optimization — Why it matters: Specifically tuned for Apex’s 19-round mags, not the 17-round version, so you get max capacity without feed issues.

Who It’s For

This spring set is for budget-conscious shooters running Springfield SA-35 pistols or FNX-45s with Apex extensions. If you’re a first-time buyer upgrading a stock magazine, or a seasoned competitor wanting a cheap fix for feed problems, this fits. It’s not for those using Apex 17-round SA-35 mags—stick to stock springs there.

Pros and Cons

• Pros: Affordable at $25; Rocket Wire lasts longer than standard springs; improves both feeding and slide lock; easy install.
• Cons: Limited compatibility—only works with specific Apex mags or FNX-45 with extensions; not recommended for 17-round SA-35 mags.

Comparison: Apex vs. Stock vs. Wolff

Feature	Apex Extra Power Spring	Stock SA-35 Spring	Wolff Extra Power Spring
Material	Rocket Wire	Standard music wire	Chrome silicon
Compatibility	SA-35 19rd, FNX-45 w/ ext.	SA-35 all mags	SA-35, some 1911 mags
Price	$25	$10 (stock)	$15
Durability (cycles)	10,000+ (per Apex)	5,000 typical	8,000 typical
Slide lock reliability	Improved	Variable	Good

FAQ

Will this spring work in my stock SA-35 magazine?

Yes, if you have the Apex 19-round magazine. It is not recommended for the Apex 17-round magazine. For stock SA-35 mags, check compatibility—some users report it works, but Apex advises against it.

Is this spring legal in all states?

Yes, magazine springs are not restricted by capacity laws in any state. You can buy and install this without issues.

How do I install this spring?

Disassemble your magazine, replace the old spring with the Apex one, and reassemble. It’s a drop-in fit—no tools needed beyond a punch for the base plate.

Does this spring work with .45 ACP in the FNX-45?

Yes, it’s designed for FNX-45 magazines with an Apex Magazine Extension. Tested with .45 ACP loads.

Get the Apex Extra Power Magazine Spring Set

Stop fighting weak springs and unreliable slide lock. For $25, this Apex set gives you a proven upgrade using Rocket Wire that lasts. Order now and get it shipped to your door in 1-2 business days.

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

See more: Springfield SA-35 Magazines | FNX-45 Magazines | Apex Tactical Parts

Last updated: April 2026