Quoted:
I have the 8.25" Spikes uppers and have used it with a Geissele SD3G trigger and the standard trigger that comes with CMMG lowers. With the Geissele I had 3 that did not fire the first time, but fired the second time. With the CMMG trigger I did not have any issues which suprised me. I am assembling a Spikes lower that I just got my stamp back on and will be using their Battle Trigger to see how it works.
No different than any quality milspec trigger. I have one in my 5.45. The corrosion resistance is nice, and the feel of the pull is
slightly better than most parkerized trigger groups, but that's about it. Ignitiion in my case is still not reliable. When I get home, I will try the cut hammer leg and then an SSA I think.