Sylvan Arms AR-15 f/9mm Glock Conversion Block Black 0RD. 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 Specifications for Sylvan Arms AR-15 f/9mm Glock Conversion Block: Manufacturer: Sylvan Arms Color: Black Finish: Anodized Fabric/Material: 6061-T6 Aluminum Steel Gun Make: Glock Gun Model: AR-15 Caliber: 9mm Luger Magazine Capacity: 0 Round Magazine Included: No Condition: New Weight: 4.2 oz Features of Sylvan Arms AR-15 f/9mm Glock Conversion Block 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. Package Contents: Sylvan Arms AR-15 f/9mm Glock Conversion Block What firearm models does the manufacturer say Sylvan Arms AR-15 f/9mm Glock Conversion Block is compatible with? The manufacturer suggests that Sylvan Arms AR-15 f/9mm Glock Conversion Block is compatible with AR-15Sylvan Arms GCB100-0RD: AR-15 f/9mm Glock Conversion Block Black