Quality is top notch, which has always been the case with EGW. Everything fit perfect. I bought the EGW as well as a cheap Amazon version for comparison. The EGW was longer allowing more scope adjustment, options. Everything fit perfectly right out of the box and the materials were top shelf. The Amazon cheap one screws were too long interfering with action and it would need a very slight massaging with a Dremel to get the screw heads to go down flush on one of the holes. Machining was definitely not as precise and material quality was definitely lower. The one thing however that the cheap China one did allow that EGW did not was the ability to see the factory sights when the rail was installed. While the EGW only allowed visibility to a little less that 3/4 visibility of the top of the sights. You could see just enough at the right angle to get by in a pinch. If the EGW was cut just a drop deeper it would go from a great rail to a better than perfect rail set up on the surpreme. Not sure if the extra material adds to rigidness and keeping red dot /scope at zero. But if rigidness can be achieved with a little more sight visibility that would take this product to the next level. Other than that EGW has yet again produced a high quality product. (Last picture is sight view of cheap Amazon rail for comparison) The EGW is without a doubt the superior overall product in regards to attention to detail and overall quality.