NDZ Extra Power Guide Rod Kit for Glock GEN 4 20 20SF 21 21SF

Fits Glock Gen 4 Models: G20, G21, G40, & G41.

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

The NDZ Extra Power (EPR) Kits provide a decisive advantage for all Glock owners. Special features include a rigid stainless-steel body that improves lock up by completely removing "guide rod flex". The hex screw removable tip allows the user to choose various spring weights that will calibrate the ammunition to their Glock. The NDZ Gen 4 Adapter Ring installs under the retention end screw thereby making up the difference of space in the front of a generation 4 slide as well as retaining the spring accordingly to ensure a perfect fit and function. NDZ Performance makes all of its products with pride right here in the USA to the highest quality standards with a lifetime warranty against manufactured defects. Upgrade your Glock's guide rod with EPR Kit from NDZ Performance today!

Included in this Kit:

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

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

Glock Factory Recoil Spring Weights by Model:

• Glock Models: 17, 20, 21, 22, 24, 31, 34, 35, 37, 40, 41 - Factory Stock Spring weight is 17lbs.
• Glock Models: 19, 19X, 23, 32, 38 - Factory Stock Spring weight is 18lbs.

What Recoil Spring Weight do you Need?

• 11 - 13lbs 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
• 16lbs Springs: For Reduced Power Ammunition Loads.
• 17 - 18lbs Springs: Factory Weight.
• 19 - 24lbs Springs: For Heavy Power Ammunition Loads +p or +p+.

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.

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.