Quote Originally Posted by masakari View Post
As far as the anti-rotation, the tabs are a little bit far away from the receiver for my liking. I guess they were trying to allow for the tolerances of thicker billet receivers, but it wound up making the tabs kind of worthless, as they allow for one or two millimeters of rotation before impacting the receiver. While I have never had mine rotate, that would be my one complaint.
My RIS II is exactly like that, on a billet or forged upper. I’ve had it for 10 years, no issues. There’s the USGI guns, also. Intellectually, I’m certain that DD rails are solid, but I agree that the tabs are not confidence inspiring.