BTW I went with a Knights Armament Mount. Aesthetically, I think its one of the best looking mounts, looks solid too. Its a little bit more expensive than the LaRue, and its a little bit heavier (just a little bit). But its adjustable height. It comes with 2 spacers, for a total of 3 different height settings. One setting are for HK rails, one setting for Standard AR flat top absolute and the last setting for Standard AR flat top lower 1/3.
Side note: If you are running a VLTOR CAS rail system, it will provide a lower 1/5 cowitness (

$@%@$#@&^%$!!!!!!) Best thing I found for my Vltor rail so far...