Question Regarding LMT FSB

Just got a new LMT 16" in and it does not have the F marking on the FSB indicating the correct height. I know they use the correct FSB but is this normal for them not to be marked F? My colt has the F on the left side and I justed wanted to be sure.

THanks!

It is the correct one, they dont have theirs marked as they only sell flattops.

I asked the same thing when I bought my FIRST LMT 14.6 upper:D

Yep no F mark on mine ,as said B4 that’s what they have .

thx guys

cant wait to go shoot it