Apex Extra Power Magazine Spring Set

Description

For shooters running a Springfield SA-35 or an FNX-45 in Arizona’s demanding environment, a weak magazine spring is a fast track to malfunctions. Dust, heat, and suppressor use put extra stress on your gear. The Apex Extra Power Magazine Spring Set is a direct upgrade built to solve two specific problems: inconsistent cartridge lift during the feeding cycle and failure to lock the slide back on an empty magazine.

These springs are manufactured in the USA from Rocket Wire. That’s not marketing fluff — it’s a material chosen for demanding applications where durability and consistent tension are critical. In high-dust conditions like the desert, standard springs lose temper and tension faster. Rocket Wire holds its spring rate in extreme heat and resists deformation from sand and grit. You get reliable, repeatable feeding shot after shot.

Fitment is straightforward but specific. The springs are confirmed to function as intended in the following setups:

• FNX-45 magazines with an Apex Magazine Extension installed
• Apex 19-round magazines for the SA-35 Series Pistols

Important: These springs are not recommended for the Apex 17-round magazine. Stick with the 19-round version for proper performance.

Here’s what you actually get for $25:

• Improved slide lock-back — Even with a suppressor adding backpressure and carbon fouling, the extra spring force ensures the follower pushes the slide stop up reliably on the last round.
• Consistent cartridge lift — The stiffer spring keeps the stack under positive tension, reducing nose-dive and feeding issues, especially in dusty or hot conditions.
• Durability for high-round-count shooters — Rocket Wire resists fatigue better than standard music wire. You won’t need to swap springs every few thousand rounds.
• Designed for suppressed use — Extra gas and slower cycling times need a spring that keeps up. This set maintains timing even with a can attached.

Made to Apex’s exact specifications by a selected US spring manufacturer. Drop-in install with no gunsmithing required. If you run an SA-35 with the 19-round Apex magazine or an FNX-45 with an Apex extension, this is the spring set that keeps your pistol running hard in the desert.