Duramag SS CPD AR-15 Rifle Magazine 6.5 Grendel 20 Round Black 1 Pack Stainless Steel 20RD. This Duramag 6.5 Grendel magazine is no exception. Its 410 Stainless Steel body holds together many key features: Its Proprietary Liplock design that assures perfect round placement; A Blue Advanced Geometry Follower for smooth feeding; Durable Teflon-360 coating technology that enhances magazine-wide performance & reliability; and EverFlex anti-fatigue spring technology. Specifications for Duramag SS CPD AR-15 6.5 Grendel 20 Round Rifle Magazine: Manufacturer: Duramag Color: Black/Blue Fabric/Material: Stainless Steel Magazine Capacity: 20 Round Caliber: 6.5mm Grendel Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Condition: New Package Contents: Duramag SS CPD AR-15 6.5 Grendel 20 Round Rifle Magazine What firearm models does the manufacturer say Duramag SS CPD AR-15 6.5 Grendel 20 Round Rifle Magazine is compatible with? The manufacturer suggests that Duramag SS CPD AR-15 6.5 Grendel 20 Round Rifle Magazine is compatible with AR-15Duramag 2065041206CPD-20RD: SS CPD AR-15 Rifle Magazine 6.5 Grendel 20 Round Black 1 Pack Stainless Steel