Spare Recoil Springs for Apex Full Size Guide Rods – 9MM – 3.7”+

Spare Recoil Springs – 9MM, 3.7”+ Barrel, for Full Size Guide Rods

These are standard ISMI recoil springs, sold as spares for the full-size guide rod assembly used in the Hellcat Pro and compatible 9mm platforms. If you’re tuning spring rates or need a replacement after extended use, this spring restores factory-spec cycling for 3.7”+ barrel configurations. Designed to work with the kit’s guide rod — not a standalone upgrade.

Compatibility

• Springfield Hellcat Pro (3.7” barrel)
• Full-size guide rod assemblies from the kit (9mm, 3.7”+ barrel)
• Glock 17 (with appropriate guide rod length — verify fitment before purchase)
• Other pistols using a full-size guide rod of matching dimensions (6.25” overall length, 5.5” spring section)

Note: Glock® is a federally registered trademark of Glock, Inc. Apex® is an independent manufacturer and seller of aftermarket parts and accessories for Glock® pistols, and is not affiliated with or endorsed by Glock, Inc. or Glock Ges.m.b.H. The use of Glock® on this page is merely to advertise the sale of Glock® parts or components.

Key Features

• ISMI-manufactured spring – consistent tension, corrosion-resistant wire
• 9mm specific – not for .40 S&W or .357 Sig variants
• Replacement for worn springs in the kit’s full-size guide rod assembly
• Standard weight – no aftermarket tuning required for factory loads
• Packaged individually – order as needed

Install Difficulty

Difficulty: 1/5 – Simple spring swap. Tools needed: punch or small flathead for retaining pin (if applicable), soft bench block. No fitting required. Expect 2–5 minutes.

Frequently Asked Questions

Will this spring fit my Hellcat Pro factory guide rod?

No. This spring is designed exclusively for the kit’s full-size guide rod assembly. It will not work with OEM guide rods or compact-length rods.

What spring weight is this?

This is the standard ISMI spring weight supplied with the kit for 9mm full-size guide rods. It is not labeled for aftermarket tuning weights — if you need a different rate, verify with the manufacturer.

Can I use this in a Glock 19 with the kit’s guide rod?

Only if you have the full-size guide rod (not compact). The Glock 19 requires a compact-length rod — this spring is for full-size (Glock 17 length) rods. Check your guide rod length before ordering.

Shipping & Warranty

Ships same business day if ordered by 2 PM ET. Standard warranty applies — defective springs replaced within 30 days of receipt. No returns on opened packaging. Contact us for RMA before returning.