Sig Sauer P365 12rd Magazine is compatible with all models of the P365 micro-compact, concealed carry pistol. The unique capacity witness hole allow you to see how many round you have remaining in the pistol. This allows full capacity status to be verified without the removal of the magazine. The interchangeable baseplates are designed to eliminate the gap between the mag and the grip of the pistol . Additional baseplate that can be easily installed to accommodate P365 XL pistols. Trusted by military, police and civilians for decades, SIG SAUER has earned a worldwide reputation for the unquestioned accuracy and unflinching reliability of its pistols and rifles. Sig Sauer magazines provide exceptional fit and reliable feeding in their high quality firearms.