Weapon mods + equipment

[Battlegrinder]

I was thinking that STS could add some new equipment and items into SL.
Grenades: not just for damage, but with effects, like stun, knockdown, or gravity well. Could provide a little bit of skill exchange between classes.
Deployable shield: Need a moment to catch your breath, let your skills recharge, ect? Just toss down a shield and be protected from enemy fire for a moment. The catch is, you can't shoot back. Could also be used to trap a troublesome foe inside it, or prevent enemies from chasing you when you retreat.
Turret: The Scorn get to call in turrets to support them, I think its time we get to return the favor.

Also, a minor adjustment to crafting. Instead of just upgrading your weapon to a better version, we should be able to just tweak it slightly by adding new parts onto it.
Scope: boost to hit% and crit%.
Silencer: Boosted dodge rate.
Extended magazine/canister: Boost to fire rate and damage.
Plus some new parts:
Grenade launcher: Fire a potent AOE shot. Very slow recharge
Napalm canister: Gives weapon fire stun effect like napalm rifle.
Health Drain: Gives you X percentage of damage dealt as health (Would really help commando survivability)

Upgrade parts would be transferable between weapons, and would be found in drops or as store purchases.