The LRIRMH normal not FT, ranges down to 11 a small hole 8mm is all that's needed to get 10yrds. Gaps are below plenty of room for 50, 52.5 and 55yrds. Snaps in very Nicely and hardly ever whites out, I swapped the very heave Sightron shade for one of Mick Ts much lighter.
I would not swap it
System is poop and will not attach doh