The Sylvan Arms 9mm Glock Conversion Block is a drop-in fit to give you a 9mm capable lower without resorting to buying a pistol caliber-specific option. Designed to install in Mil-Spec lowers almost exactly like a standard rifle magazine. Easy to install and swap out Accepts popular Glock 9mm magazines Designed to work with Mil-Spec lowers Does NOT include last round bolt hold open Product Details Material: Steel and 6061-T6 Aluminum Finish: Black Anodized Weight: 4.2 oz. Designed, built and assembled in the USA 100%25 Satisfaction Guarantee Limited Lifetime Warranty Check it out in action: Sylvan Arms 9mm Glock Conversion Block If you have any questions, please contact us before ordering. Install Video: https://www.youtube.com/watch?v=9zCqAI_fNLA