$120+tax for locals in the Knoxville area or have it shipped where legal to own (Shipping prices will vary by how many you order). 

Made in the USA, the Magpul PMAG D-50 is a rugged, lightweight, and reliable polymer drum magazine designed for SR25/M110 pattern rifles. The Magpul PMAG D-50 shares its DNA with the legendary Magpul PMAG GEN M3, which includes next-generation impact and crush-resistant polymer construction and the ability to seat fully loaded on a closed bolt. Robust stainless-steel internals withstand corrosion and long-term storage while loaded with no loss of function, spring fatigue, or reliability concerns. A slip-on semi-rigid dust cover prevents grit and debris intrusion during storage and transport. An anti-glare translucent window on the rear of the drum makes for quick positive visual indication of remaining ammunition.