This high-quality 7-round magazine for Windham Weaponry’s powerful .450 Thumper is a lightweight and highly reliable straight design magazine. All components are mil-spec and made in the U.S.A. Its blue single-shot follower eliminates feed issues, and its heat-treated aluminum body features a PTFE (Teflon) finish for superior performance. A stainless steel magazine spring provides consistent pressure for reliable feeding. Made in U.S.A.