So I am putting together a build with a MK18 RIS II and I am encountering something I have never with my other 4 Lite railed builds. The rail collar is a little loose when the barrel nut is torqued to 75lbs, usually it is tight to the receiver and no wiggling. Is this common? Is it going to be ok when I pull it all together with the 6 screws?
That’s normal. When you mount the rail the 6 screws will hold it tight.
Also notice that the 5 o’clock and 7 o’clock screws are shorter than then other four.
sounds good, I was hoping so, I am so used to having it beyond tight.
thanks for the reasurement.