Okay highly recommend this product, this is very simple and easy install, insert the battery and tighten two screws. I did not have to make any adjustments at all. to the sights. Plan to use as my conceal carry during the summer months. The laser will certainly help if I have to use it since this is a mouse gun with small sights. The whole process took a few days since I ordered over the weekend, I highly recommend this purchase, especially with the $50.00 rebate included.