I'm looking for a little help in removing the front sight on my M&P22. I'm assuming it's held in place with a set screw, but I've tried using a 1/16" and a 2mm allen wrench, but both appear to be too large. The rear sight uses a 1/16", and I would think the front sight would be the same size, so I'm a little baffled.

Any help would be greatly appreciated. Thanks in advance!