I typically swap scav for FJ. I play Dom primarily and it's pretty critical IMO for capping. Plenty of SMG users, so you can usually find another one to pick up. Not to mention, you probably should pickup something for your secondary slot they moment it's feasible during the match.
I also prefer dexterity to ex cond, recovery from sprinting plus faster climbing is nice for rushing.
MSMC: long barrel and quickdraw KAP-40: akimbo Lightweight Toughness Dexterity and Dead Silence Perk 3 Greed
Sometimes I'll swap out dead silence with extreme conditioning. I just hate hearing my footsteps through my astro a50's(so loud). If I'm playing kill confirmed I'll run with extreme conditioning to run after those tags but any other time I'm using dead silence.
"cant get used to the irons which work perfectly fine on most weapons"
The iron sights, regardless of weapon, are still slower to pull up than just blindfiring. Laser sight helps with that. Even if you start your firing and pull into the iron sights, you'll still land more shots on target with the laser sight than you would have otherwise. On SMGs this is a rather large boon. You shouldn't die when reloading enough to worry about having fast mags with an SMG like the PDW and the stock is still slower than just strafing with the laser. More accurate, yes but it's still slower and lowers your overall vision. .
GamerTag: Te1vanni Guard "Telvanni you would disprove everyone. :D"- Saint_of_Misery