Introducing the Sig P365 Magazine Extension for the Sig Sauer P365 X Macro, made by Tyrant CNC. Designed to increase your carrying capacity by 3 rounds of 9mm, this extension takes your total capacity to 20 (+1), giving you the peace of mind you need when it matters most. CNC machined from 6061 aerospace grade aluminum and featuring the innovative Tyrant CNC 'NoBak' retention spring technology, this P365 magazine extension is built to last and perform. The dimensions of the extension have been specifically designed to match the Sig P365 frame, minimizing the chances of printing through your clothing and allowing for a discreet carry.