This is a well made pinky extension. I could only give it 3 stars because of a couple of issues. When the magazine is placed down on the baseplate it sits at a much different angle than factory magazines do. Also, the pinky extension is slightly larger than Sig's. Not really a big deal but this won't match the factory extension.
It’s A little larger than the 10 round magazine pinky extension that comes with the sig P3 65. I ordered it and loved it so I ordered another one. My friend saw mine and he ordered two to change both of his 10 round magazine pinky extensions.
Buy the SIG extender, this one reduces the mag capacity by 1 round. If you try and force the round into the mag, it will dent the 7th. And they are non-refundable…now I know why.