Karbine is a shorter gun, shorter barrel, air tube and forestock. K is carbine s (sporter) or t (thumbhole) denotes stock then theres the fsb (full shrouded barrel) is louder than the rest.
sure you edited that but didn't mean to sound shirty mate, I was confused as thought you were cronoing them in your gun for some reason,
I aint a million miles away if you would like some rifle specific readings
looks a smart job to be fair not much different to me own set up. having a smaller screen to keep the light down and then putting a blue led on abit dumb though.
If it's crawling then you probably will get a few with lamp but they soon wise up so not realy much point as you already have nv. I don't alter my zero either but it depends on the layout of the place. Like rez says get some distance from them because they ain't daft.