This is a baseplate for Sig P365 magazines to extend them to fit into P365X grip modules. It does not add any capacity, they remain at 10 rounds, just extends the body length so they can be inserted into the P365X which is intended to be a 12 round firearm. Perfect for anyone who converted from a P365 to a P365X and wants to still use the 10 round magazines for practice.

PLEASE PLEASE PLEASE do not carry for self defense while using this piece, while I have yet to break one in normal use you would never want to trust your life to a printed piece of plastic. This is just meant for range use.