I went back and reviewed the SPR CQB thread and you made some similar comments that resonated with me. CQB is quite possibly the last priority (based on historical use) for my GP carbine, so maybe I'm not finding the 1-6 I want because what I need isn't actually a 1-6.
ETA: Removed questions not germane to 1-4/1-6 thread topic. I'll take them over the above mentioned SPR thread.