Trying to think of which map you're referencing. Sky shock? That's a big cosmodrome control map but I don't remember mountable guns (haven't played it forever). Bastion and first light have them but are on Mars and the moon, respectively.
Sky shock is horrible and first light hasn't been fun since the beta when vehicles were actually relevant. Bastion is my least disliked of those three but it's still rough. PvP is so clusterfucky that smaller is usually better (e.g. 3v3 on Burning shrine).
Bleh, I've given up on that. Zero helmets and still missing the raid scout and sniper rifle. Even raid gear I get has terrible perks like sidearm reload gauntlets and Arc armor Titan chest pieces.
I've only missed one week of reset raiding in the last year, for family reasons. It'll definitely be weird but honestly I'm happy with a little break. Shadowshot glitch got Trials canceled and even ruins normal Crucible, no interest in PvP until it's fixed. King's Fall is fun but the least replayable raid, strike playlist is super repetitive and the exclusive drops are way too rare (crappy Darkblade fusion rifle is my only one... Another fusion rifle ;_
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By Friday I'll be well rested and maximum hyped for Heroic