This Sig Sauer P365 Factory 10 round 9mm magazine and pinky grip extension combo provides the ultimate 10 round solution that gives better control. Our MTX 365 Plus 0 Grip Extension is a great improvement for control of your P365 with standard frame focused on ideal ergonomics. Now you can get our grip extender already combined with the magazine. Extension is pre installed on the factory Sig Sauer magazine, no assembly required! Note: This California compliant P365 magazine ships to every state