I recently purchased a 2012 VTAC M&P40. Come to learn that the front sights tend to “fall off” or “fly off” if in process of firing the gun. I understand it could be an issue in the machining of the dove tail cut. Not sure if it’s in the gun or the sight. I want to replace the sights with something comparable to the VTAC in height. Looking for recommendations please. This is my first hand gun. I love it and liked the original sights. Thank you for any advice.