Product Description The Strike Industries Modular Guide Rod for Glock Gen 3 pistols is a durable, customizable recoil system built around a corrosion-resistant stainless steel shaft and anodized aluminum end caps. Designed to accept many aftermarket Glock recoil springs (as well as Strike Industries custom recoil spring weights), it allows you to fine-tune recoil characteristics and reliability without purchasing multiple guide rods. Included shims help ensure proper fit across a wide range of compatible Glock Gen 3 slides, and this configuration features a black finish end-cap set for a clean, tactical look. Product Highlights Modular design lets you quickly swap recoil spring weights by removing the end cap. Corrosion-resistant 303 stainless steel guide rod shaft for long service life. Anodized 7075-T6 aluminum end caps (black) help resist cracking compared to polymer OEM rods. Shim kit included to fine-tune fit across compatible Glock Gen 3 slide variations. Compatible with multiple Glock Gen 3 full-size/long-slide models (see Specs). Specs Brand: Strike Industries Manufacturer Part Number: GMGRSBK UPC: 708747547245 Product Type: Modular recoil spring guide rod Compatibility: Glock Gen 3 models G17, G17L, G22, G24, G31, G34, G35, G37 Overall Length: 3.1 in Shaft Material: 303 stainless steel End Cap Material: 7075-T6 aluminum (anodized) Finish/Color: Black (end caps) Shaft Dimensions: 0.223 in ID x 0.41 in OD Included: (1) SUS303 modular guide rod, (3) 7075-T6 aluminum end caps, (2) SUS304 0.2mm shims, (1) SUS304 0.4mm shim Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.