just in case anyone is curious, short of the very first MK.31 HMG, you can collect the rest of them, in the game.

whether you have the strength to rip them from turrets or otherwise.

what one need do, is simply call up your vehicle, and walk the thing to your trunk; stow in your trunk/stash...

since the game is mostly linear and dare i say, trite, ive taken it upon myself to create my own missions.

therein, i will be scouring the city for these turret machine guns, where i can.

will let you know how many i find.