We recommend classic magazines to shooters looking for a tough magazine that feeds awesome and locks back reliably in most modular 1911 double stack and 2011 style pistols, including Staccato* and Springfield Prodigy. Gen2 classic basepads and retention plates make it easier to remove the basepad for cleaning, but they are incompatible with Gen1 setups. Please note the image to determine which generation you have. Features: Caliber: 9mm Capacity: 10 rounds Tube: 10 round 126mm Stainless Steel Follower: Lockback Spring: + 18% Basepad Gen2: Aluminum, prevents over-insertion Backed by the Atlas Magazine Warranty Compatibility: All Atlas Gunworks Pistols with a tactical or carry magwell All known 2011 style and 1911 double stack modular pistols with no magwell or a Staccato Compatible Magwell Staccato*: Staccato C2, Staccato P, Staccato XL, Staccato XC using a Staccato Magwell Springfield: Prodigy 5 1911 DS, Prodigy 4.24 1911 DS *Some Staccato Pistols made after August of 2024 have new frame dimensions. which prevent the use of all known aftermarket magazines.