I recently got a replacement clip for my 23C, and it works great, but does not stay in very well due to what looks to be a defective retainer spring. The replacement part on Numrich's website looks totally different from the one that is currently in the gun. It would not surprise me if the one in the gun isn't original. The question I have is this. Does the one on the following link look like the one found in your 23C?
https://www.gunpartscorp.com/products/1181110

Thanks,
Tim