Phase 5 Weapon Systems Inc Dimpled Magazine Release Button Anodized Black PMR-BLK Dimpled. These Gun Parts by Phase 5 Weapon Systems Inc are crafted from 6061-T6 billet aluminum for durability and enhanced resistance to corrosion. Each Phase 5 Dimpled Magazine Release Button is machined from one solid piece of billet aluminum eliminating unnecessary parts and reducing weight. Whether you need a replacement for your current mil-spec magazine release button or want to create your own these Phase 5 Weapon Systems Inc Dimpled Magazine Release Button Enhancements are the perfect way to give your gun a unique look that also allows you to easily release your magazines in emergency situations. Specifications for Phase 5 Weapon Systems Inc Dimpled Magazine Release Buttons: Manufacturer: Phase 5 Weapon Systems Inc Gun Make: AR Platform Gun Model: AR-15 AR308 Model Generation: 1 Hand: Right Fabric/Material: 6061-T6 Aluminum Size: Small Weight: 0.1 oz Condition: New Features of Phase 5 Weapon Systems Inc Dimpled Magazine Release Buttons Fits AR 5.56/.223 and 7.62/.308 receivers. Package Contents: Phase 5 Weapon Systems Inc Dimpled Magazine Release Buttons What firearm models does the manufacturer say Phase 5 Weapon Systems Inc Dimpled Magazine Release Buttons is compatible with? The manufacturer suggests that Phase 5 Weapon Systems Inc Dimpled Magazine Release Buttons is compatible with AR-15 AR308Phase 5 Weapon Systems Inc PMR-BLK Dimpled: Dimpled Magazine Release Button Anodized Black