I’m currently putting together a new AR upper. I’m going with a 14.5 inch barrel (registered SBR) from cmmg. I’m trying to decide between a 12 inch or a 10 inch free float rail. Probably going to go with Daniel Defense. I’ve always like the look of the “dissipator” type uppers, which is what got me to thinking about the longer rail. Can anybody show me pictures to help me decide please?
Thanks
Evidently the military thought your idea had merit, as they did the same thing with the SOCOM RIS II contract. Daniel Defense was awarded the rail for the M4 carbines.
Below is a picture of the DD RIS II rail on a 14.5" barrel.
Here is the DD 12.0 Lite rail, which uses a similar lock up method. This one is on a 16" SS WOA barrel.
DD 12.0FSP on a 16" barrel.
Early DD RIS II rail on a 16" barrel.
DD M4 12.0 on a 16" barrel
DD RIS II A2 rail on a 16" barrel.
This carbine isn’t one I own.
DD 12.0 FSPM on a 16" barrel.
Another DD 12.0 FSPM on a 16" barrel
DD 12.0 Lite
Another picture of the early DD RIS II rail.
If you need more let me know.
The RIS II that was selected no longer has the cutout for the FSB or are there 2 versions that will be in service? 
Here’s a few from an old upper…not Stick quality 
But none of mine are MultiCam…
The RIS II that was selected no longer has the cutout for the FSB or are there 2 versions that will be in service?
There are already 2 different DD RIS II that are in service. One is for the M4, the other is for the MK18. Neither have a cutout for the FSB.
More cool pictures are always welcome. I ordered a Daniel Defense 12 inch M4 rail today for my build. Now I need to decide what kind of rail covers I like best. Suggestions? I’m planning on putting Troy folding sights on it, and I already have a TA01 ACOG. I like the idea of a little red dot sight mounted on top of the ACOG that I saw above. Can someone educate me on those too?
I can’t verify that any are cool, but I’ve certainly got more pictures to post.