Radian Weapons Radian Weapons Compressor Quick Tune Guide Rod Fits Glock 19 Gen1-5/19X/45 Includes 3 Springs 13lb/15lb/18lb. The problem? Loose screws are too common and thread locker forces you to commit to one spring weight. Enter the screwless design of the COMPRESSOR Quick-Tune Guide Rod. The dovetail interface is captured by the spring creating a simple and secure lock-up. Flutes along the guide rod allow the spring to move with less friction for smoother cycling. The heat treated guide rod has a slick durable and corrosion-resistant Nitride finish. Includes: 1 - Hardened 17-4 SS Guide Rod 3 - Flat wire Springs in 13lb 15lb and 18 lb weights 1 - SS Washer for Gen3 1 SS Captive bushing for Gen4 & Gen5 compatibility 1 Spring compression tool. For GLOCK G19 GEN1-5 G19X and G45 Specifications for Radian Weapons Compressor Quick Tune Guide Rod: Manufacturer: Radian Weapons Fabric/Material: Stainless Steel Country of Origin: USA Package Contents: Radian Weapons Compressor Quick Tune Guide Rod Radian Weapons A-G-19-Rod Compressor Quick Tune Guide Rod Fits Glock 19 Gen1-5 G19X G45 G47 & G49