Unrep explained already. Conrep=connected replenishment. Vertrep=vertical replenishment. Gator is an amphib, LHA in my case, big helo carrier. I do try to de jargon, but after awhile that's how you think and translation is a bear.
I have seen M-14s on watch in the early 2000s. Never qualed, I got an M-9 and occasionally an M16A4. Also had shotgun and M11 quals. The Navy and rifles is a rant worthy topic, especially since on my own doing I shot with the Navy team and can hit things at 600 and 1000 yards. Short version is shipboard sailors, even the ones who stand armed watch everyday, are not issued weapons. In the armory, out of the armory. Arrrghh, fine for a Mossberg 590 or a pistol, but hey, look at those knobs on our rifle! I estimate about zero chance of being effective at rifle ranges. Qualification does not teach sight adjustment or come ups. Never is a rifle going to be sighted by its end user. And the cherry on top? The Navy spent money to specifically get the M-16A4 which has a full happy switch, I assume for hosing small craft. Guess what we never train on and are forbidden to touch? So, about the most useful thing we do with a rifle is launch lines.
And funeral detail. I volunteered to do several old duffer burials at sea. No blanks, so they used line launching cartridges, lotta powder, loud. No orange ear plugs in video, no flinching in video, me with my back directly in front of the honor guard. Unburnt powder in my Dixie cup. Wonder why my hearing is degraded, episode 5312... :D