Almost perfect… - Tactical Precision Manufacturing TPM Sig P365 XMacro 3 Round Extension

Bought a new Sig and was shopping accessories on Optics Planet. Decided to give these a try, who doesn’t need more rounds? Overall quality is excellent, tight fit and finish and doesn’t add much length or weight. The 20 cartridges all fed flawlessly throughout several mag-dumps, and this is a worthy accessory. However at the range I noticed that the reduced spring tension would not allow the slide stop to work for the last round, every time. Not a big deal if you count as you fire, but I just hate pulling the trigger on an empty chamber.