Sorry for the necropost... I just got one of these installed on my 17 earlier today. Won't get a chance to shoot it for two weeks or so, but I'm looking forward to not having my teeth hurt when I let someone shoot it.
Two points that may be of interest:
1. As mentioned earlier, it doesn't require timing or shims, which is nice, but the manual doesn't do a good job of explaining this, since it's a one size fits all sort of thing. The folks at VA Arms had to call in and talk to SF about it. If you're putting it on yourself, knowing this will save you some headache.
2. Leading from #1, it's a four slot FH, and doesn't have a solid section facing down like an A2 to prevent dirt and such being kicked up when firing prone. I bought it mainly to mount a future can to it, and to get rid of the unpleasantness that is the FSC, so that's ok with me.
Now to get an NFA trust set up...
Last edited by BaronFitz; 03-28-12 at 17:46.
I have far more guns than I realistically need, but far less than I want. - NongShim