Hayes HC1911 20rd 9mm magazine  9mm 20rd Lockback follower +18% spring 140mm Aluminum basepad Works with: Cobra Series HC1911 Atlas pistols Staccato - C2, P, XL, XC Springfield Prodigy DS  

New internal dimensions greatly improves feeding in all double stack 1911's New upper tube dimensions paired with a proper follower makes reliable lockback achievable  9mm tubes work with .38 super and .38 super comp.  Designed to...