So lets take a second to talk about this:
And by this, I mean the perk: Armor Piercing Rounds.
Naturally, when I first unlocked this ability, I assumed (as most of you probably did) that it meant that I can shoot through one enemy into another. This is true, you can do this. You'll see other weapons out there with the same perk. I've personally found a Fusion Rifle and an Auto Rifle with the same perk.
However, this perk seems to impact Sniper in a way that the other weapons do not benefit from. Namely:
IT CAN SHOOT THROUGH WALLS!
I've been getting a lot of messages lately about my hacking skills in Crucible. You see, I play a lot of control, and it's become very easy to defend a point from a mile away, when you can shoot through walls. Naturally, windows are my favorite. I can shoot directly into C from the B turret on First Light. I can shoot through the Rock providing cover at B on Shores of Time, if I'm behind the heavy ammo spawn.
I was planning on uploading a video for you guys to see this, but my PS4 isn't cooperating. Now, I'm not sure if Snipers are supposed to be able to do this or not. I can tell you that it is incredibly fun standing outside the window at A on the Moon, dancing at the enemy in an effort to make them dance as well, only to then pop them right in the head through the wall.
Now with Video:
http://youtu.be/kMeRQgvlsa8
Highlights at:
6:10
8:15
11:35
Very sorry about video quality.