Advantage Points For the Rifle

Rifles can be lethal (in the right hands)but can not be used to their full abilities at ground level Take Snipers for example they always look for high ground
and since zombies are taken down by headshots rifleman (just a term doesnt mean just men) cant afford to not have an advantage point
Houses that have a second floor are great for you only need to fortify the 1st level and you can go upstairs and rain hell when you feel like it
A Church bell Tower (older churchs have heavier doors), one of the most ideal sniper points Used in WWII as positions for snipers to set up ambushes, but since zombies are going for the bite its perfect to take as many down before the knock on the door
Of course the higher you go the more physics you must apply to get that shot