NDZ Extra Power Guide Rod Kit for Glock GEN 4 ONLY 17 17L 22 24 25 31 34 35 37

Fits Glock Gen 4 Models: G17, G22, G31, G34, G35, & G37.

Does Not Fit: Gen 1-3 or Gen 5 Models.

Get superior recoil control and durability with the NDZ Performance Extra Power (EPR) Guide Rod Kit, engineered exclusively for Glock Gen 4 full-size models. This upgraded guide rod system features a rigid stainless steel body to eliminate guide rod flex and enhance slide lock-up; ideal for duty, defense, or high-power ammunition. The included Gen 4 Adapter Ring ensures proper spring alignment and fitment by compensating for the unique slide dimensions of Gen 4 pistols. Whether you're upgrading for performance or reliability, this is a precision-made solution built to handle real-world demands. Get yours at NDZ Performance today!

Kit Includes:

• 1 - Black Anodized Steel Gen 4-5 Guide Rod Adapter.
• 1 - Stainless Steel Guide Rod with hardware.
• 1 - 3/32" Allen Wrench.
• 1 - 20 lb. ISMI Reduced Recoil Spring.
• 1 - 22 lb. ISMI Reduced Recoil Spring.
• 1 - 24 lb. ISMI Reduced Recoil Spring.

Features:

• Rigid stainless-steel guide rod; improves lock-up, eliminates flex.
• Hex-screw removable tip; allows spring swaps for custom tuning.
• Gen 4 Adapter Ring; ensures spring retention and alignment in Gen 4 slides.
• Ideal for +P, +P+, or heavy load setups.
• Tighter slide tracking for improved accuracy and recoil control.
• Built in the USA with lifetime warranty against manufacturer defects.

Glock Factory Recoil Spring Weights by Model:

• Glock Models: G17, G20, G21, G22, G24, G31, G34, G35, G37, G40, G41 - Factory Stock Spring weight is 17 lbs.
• Glock Models: G19, G19X, G23, G32, G38 - Factory Stock Spring weight is 18 lbs.

What Recoil Spring Weight do you Need?

• 11 - 13 lbs. Springs: Typically used for Competition Shooting, or when using a Recoil Compensator with Barrel. A lighter weight Recoil spring allows for a faster recoil time. This allows the shooter to stay on target longer and makes target re-acquisition, Faster and Easier.
• 16 lbs. Springs: For Reduced Power Ammunition Loads.
• 17 - 18 lbs. Springs: Factory Weight.
• 19 - 24 lbs. Springs: For Heavy Power Ammunition Loads +p or +p+.

Note: Please make sure you are using the correct loads for the springs or you will have cycling issues.

See our complete line of Glock Gen 1-4 Products here

Important: We recommend the use of Blue Loctite on the hex screw threads when switching out springs. This will provide a firm hold and still allow easy removal when necessary.

Note: NDZ always recommends any part be installed by a qualified and trained gunsmith. NDZ promotes the use of safety practices and gear when working on any firearm.

ISMI premium springs are manufactured exclusively with certified aerospace specification alloys; stainless or chrome silicon. Then the springs are heat treated, shot-peened and stress relieved after winding to enhance performance and durability.

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.