There are currently 4 magnifications for weapons. 1x, 1.5x, 4x, and 6x. Every attachable scope reticle is currently red.
Every weapon has its own unique iron sights for a 1x default magnification.
1.5x (Actual magnification unknown) Edit
There are currently two scopes at this magnification, the red dot and the holo. The red dot is what its name implies, a scope with a red dot as the reticle. It can be applied to all weapons. The holo is a scope with a red medium sized hollow circle with a red dot in its center. There are some weapons this cannot be applied to.
There is currently only one scope at this magnification, the acog. The reticle for this scope is currently a red caret.
There is currently only one scope at this magnification, the 6x (real creative, I know). The reticle for this scope is currently a red dot, much similar to the red dot scope.
You can find an 8x Scope in every Airdrop.
There are currently two other modifiers for weapons
Every weapon type has a silencer which can only be applied to its type: Pistol, Shotgun, SMG, Assult rifle, and Sniper.
Laser Sight Edit
Adds a laser sight to your weapon to help with accuracy. It is believed by some to slightly increase hip fire accuracy, but this is unconfirmed.