This is a well constructed nicely engineered device, however, The adjustment for windage and elevation, does not allow for correction of how much the electrical connection seat allows the laser to screw into the device, which makes the two adjustments, rather than be directly up and down or left of right, to be come a vectoring adjustment. What I mean by this is that the device will adjust at a 45 degree angle to plumb, at least in the case of the unit I received. This will make adjusting the device more difficult and frustrating. Also, this device will not always fit onto the gun you intend it to. It is the correct rail for my Baretta, however the thickness of the trigger surround does not allow this to "click into place. I will need to hand modify the bac side, to allow the sides to go around the surround. Definately long enough for the entire device to fit, but there are "wings" that stick out from the back not allowing it to go fully back. Other than these two items, this is a very nice product for the money. If you are OK working with the issues above, you should be fine. If not then you best look at a different item. I know Buds is very busy, but tried to return, and got absolutely no response. Kind of glad it happend that way, as i want to keep the device now, despite the issues.