These Amend2 10 round magazines are made from a rugged and lightweight polymer material that is resistant to cracks warping and fall damage. This 6.5 Grendel mag will fit your AR-15 pattern weapon chambered for 6.5 Grendel without issue.Impact-resistant polymer bodyOrange colored followerHeavy-duty stainless steel spring resistant to corrosion and warping over timeHolds cerakote wellAmerican-madeThese 10-round Amend2 6.5 Grendel AR-15 magazines are a great choice for any AR-15 owner from the competitor home-defender or law-enforcement officer.