Please tell me the sniper projectile falls after a while of travel. Anyway, nice models.
Sure, all projectiles are gravity affected - and it can be turned off.
EXOTIC IDEA M14 Termail sight
I can't think of any way how it would be possible, sorry.
Heat seeker or corss com
Heat seaker: allows players to see other players, bombs and gases near by.
Cross com: if a enemy player is in sight it highlights the players if visable with a dimand, same with a tank but on its side. Plus a right click or some key that allows players to use satlite veiw within a slamm area incase they want to check around cornors outside.
And/or bullet proof armor
Per hit does -10 HP to player and -20 to the armor.
That can mean life or death. But some things like 50 cal. snipers would need two shots to kill someone so that one might not work out :/
I like the sattelite idea :3 And I already know how to make the armors so you will still die when you get hit by a 50cal.
if you don't include an early download i think im going to tear my hair out 
Happy hair tearing :D
F.B.I armor?
Maybe a light pulletproof vest, can fully stop bullets with less than 10 damage and absorbs a part of it when the bullet does under 25 damage. Can take up to 100 damage points.
Heavy bulletproof vest, can fully stop bullets under 15 damage, absorbs up to 35 damage. Can take up to 200 damage points.
Of course, every bullet that does more damage will do the full damage.
And maybe some kind of armor that absorbs like 10% of the damage but can take 500 damage points?