The sig p365 mag extension is compatible with factory 12-round magazines for the standard p365 frame.Please note this only works with sig p365 12 round magazines and standard frames.One of the main features of the sig p365 mag extension is the custom-engineered spring, which guarantees unmatched reliability and ensures last-round bolt hold open.

Caliber: 9mm
Capacity: 12rd
Model: MTX
Capacity: 12