The Sig Sauer P365 9mm 21-Round Magazine is a factory-designed high-capacity magazine built for superior reliability and seamless compatibility across the entire P365 lineup. This steel double-stack magazine features a black oxide finish for enhanced durability ensuring smooth function in your P365 pistol.Designed as the standard magazine for the P365-FUSE model it is also fully compatible with all 9mm P365 models including the Standard X XL XMACRO and AXG-LEGION variants. This magazine features rear witness holes to confirm loaded capacity an orange follower for quick visual confirmation when empty and a black polymer baseplate. The baseplate is designed to seat flush with P365-XMACRO (AXG LEGION & FUSE) size grip modules but when inserted in the P365 Standard P365X or P365-XL a slight gap will be present.P365 9mm 21-Round MagazineFactory Sig Sauer magazine for maximum reliabilityCompatible with P365 Standard P365X P365-XL P365-XMACRO P365-AXG LEGION and P365-FUSEHigh-capacity 21-round design for extended shooting sessionsDurable steel construction with black oxide finishRear witness holes for quick round count verificationOrange follower for easy identification when unloadedBlack polymer baseplate designed for P365-XMACRO and AXG LEGION grip modulesSig Sauer delivers unmatched reliability with this 21-round P365 magazine offering shooters an extended capacity option without sacrificing performance. Whether for duty competition or everyday carry this magazine ensures you have the firepower you need with the trusted quality of Sig Sauer.Check out our huge selection of 9mm ammo for the range self-defense and more here!Shop more Factory Sig Sauer Magazines here! Always check local laws before purchasing. Use proper ear and eye protection follow all firearm safety guidelines and store ammunition securely. Some states may restrict sales. You must be 21 years of age or older to purchase handgun ammunition. The manufacturer and retailer are not responsible for misuse.