LMT 14.5 upper, going with a PRI flip gas block/flip sight. The FH is not pinned as yet so I was looking at installing a DD ar 15 lite rail, the one with the 6 allen bolts up front and then sending off to Adco to perm FH....or sending off first after install of the PRI and once back in my hands tossing on a DD Omega rail....both rails look very nice..is there any advantage of the lite lock up over the omega...the lite just looks tight.