I'm doing an 11.5" build and am having trouble deciding between the Lite 10" rail and the RIS II Mk. 18. I plan on running an AAC Brakeout on the muzzle. Can someone educate me about some of the differences? I know the RIS II is a little heavier and there might be a slight variation in length. Also from some of the pictures I've seen the vertical profile of the RIS II seems shorter than the Lite 10". Anything else I should know?
The RIS Mk18 is shorter, c it's shorter than my 9.5 FSP Lite rail. The Mk18 will easily take An AAC mount and clear on a 10.5" barrel whereas the 10.0 Lite won't or you'll have to shim it. In a 11.5" build, you're gtg with both rails. I'd go with the 10.0 in your case bc it's lighter and one piece. But both rails are amazing.