The Agency Arms magwell was designed specifically for duty/combat usage. Machined from 6061 Aluminum and Mil-A-8625 Type 3 Hard Anodized. It has a streamline design which positions the hand up higher into the firearm and offers an increased funnel vs our EDC Magwell. Our magwells are not universal fit, they are designed to work with the installed backstrap (if any). Specifications for Agency Arms G17 Gen 5 NBS Compatible Duty Magwell: Manufacturer: Agency Arms Color: Black Fabric/Material: 6061 Aluminum Gun Make: Glock Gun Model: Glock 17 Gen 5 Condition: New Features of Agency Arms G17 Gen 5 NBS Compatible Duty Magwell Designed for Duty Use Increased funnel size Will work with models with the half moon cut NBS - No Back Strap variant Reduced capacity magazines may require fitting Package Contents: Agency Arms G17 Gen 5 NBS Compatible Duty Magwell Set Screws (2) Hex Keys (2)