Haven't tried this yet in game play, but something I'm considering.
Sniper has a Barrett Model 122 loaded with APDS rounds, giving it an AP of -10.
Ultrasound Sensors handed out to members of the team, rating 8 - Linked up via team Decker
Build includes Agility 9 + Longarms 7 + Sniper Rifle Spec + Sharpshooter Quality (Called shots at -2 instead of -4)
Gun has smartgun option, character has Datajack and Internal Router (+2 to ACC, +2 to dice pool for wireless option)
Cybereyes (Rat 4) with Image Link, Vision Enhancement x3, Smart Link, Visual magnification, Low Light vision, thermographic vision, flare compensation, microscopic lenses
Headshots - 18 Dice Pool, Average 6 hits per roll
Gun is 14DV
Average Damage - 20 DV with -10 AP - Anything other than a Blast Bunker isn't stopping the bullet
Subtract 1 damage for the barrier
Add 2 damage for the Vitals called shot
21 DV to target, - 10 AP - and if the group is being stealthy, first shot will be with the defender unaware of the attack
Setup across the street
Remove the heads of people unaware they're being shot at from a person firing "bad person go away" rounds.