Quoted:
Another one of those things I didn't have the foresight to consider.

I have a 7.5" barrel, and I ordered a 7.2" rail system.  And I'm planning on mounting my specwar 762 once that gets approved.  

Yesterday I just slid the rail onto the upper and it even covered up some of the threads where my muzzle brake is going to go.  Same day I saw someone else's post about how much gap to leave from barrel length to rail length, and it's been advised about 1" is minimum.

Well i've been looking at i'm REALLY having trouble finding a free float less than 7".  The closest i've found is DD Omega Rail that spec's call it at 6.88", which is better.

So any suggestions?  Any rail systems you suggest or ideas make mounting the suppressor on/off easier?  

I like the idea of the rail going over the suppressor, and I feel like i have seen that on people's rifles before, but the specwar diameter is 1.5".  

Just any thoughts to make this work.  I'd like to have it removable so I can use on multiple other systems, and wouldn't want to have to remove rail each time to do so.  Thanks