Works tremendously well
This item after install was a no brainer. Color and fitment are excellent. You'll definitely need at least an 1/8th inch drill bit and a #5-40NC tap. I got my tap off amazon as local stores were out of them. The only thing else I had to do was knock down the ribbed texture of my bolt release button so it sat flat and looked better which also made it easier to center punch for drilling. It was not too difficult and I got a great result. The product works as designed and I love the amount of real estate you gain with this product. This was installed on an m4 clone fit and function are perfect.