Apex Extra Power Magazine Spring Set

This Apex Extra Power Magazine Spring Set replaces factory magazine springs to improve cartridge lift during the feeding cycle and ensure positive slide lock back when the magazine is empty. The increased spring tension resolves weak follower lift common in high-round-count or worn factory springs, reducing nose-dive malfunctions and inconsistent last-round hold-open.

Compatibility

• FNX-45 magazines — with an Apex Magazine Extension installed
• Apex 19-round magazines for SA-35 Series Pistols
• Not recommended for Apex 17-round magazines

Key Features

• Rocket Wire construction — high-cycle fatigue resistance for demanding applications
• Manufactured in the USA to Apex specifications
• Provides consistent follower force through full magazine capacity
• Restores reliable slide lock on empty magazines with worn factory springs
• Reduces feeding malfunctions caused by weak cartridge lift

Install Difficulty

2 / 5 — Basic mechanical skill. Requires a punch or small screwdriver for spring retainer removal. No fitting or gunsmithing required. Typical install time: 10–15 minutes per magazine.

FAQ

Will these springs fit factory SA-35 magazines?

These springs are designed specifically for Apex 19-round SA-35 magazines. Factory magazine compatibility has not been tested by the manufacturer.

What does “Rocket Wire” mean for spring life?

Rocket Wire is a high-tensile spring steel alloy with superior fatigue resistance compared to standard music wire. In testing, it maintains consistent tension over extended round counts in high-wear applications.

Can I use these in a carry magazine?

Yes. The extra spring tension does not cause binding or stacking issues that would affect reliable feeding. Confirm function with defensive ammunition before carry use.

Ships from our warehouse within 1 business day. This product carries the manufacturer’s standard warranty against material or workmanship defects. Contact us for warranty claims.