Our .224 Valkyrie | 6.8 SPC II magazines will fit any AR-15 or M16 rifle with an upper half chambered in the .224 Valkyrie & 6.8 SPC II caliber.
Material: Stainless Steel
Q: Can I use any other caliber ammunition in this magazine?
A: Using ammunition other than what is specified may cause malfunctions and feeding problems.
I bought a few of these mags a few years ago and they performed flawlessly. I have other manufacturer's 6.8 mags that leave scratches on my projectiles as they load into the chamber. The Stag mags have not done that to me and I bought more due to their awesome performance.