A few common sense ones really, but some are unknown to the majority of the population.

• Only use Stopping Power when this weapon is equipped with a silencer. IT HAS NO EFFECTS OR BENEFITS OTHERWISE. It's a OHK to the chest or head, so work on your accuracy and save your second tier perk for something like Cold Blooded or Hardline.
• Carry either a pistol or the M93 raffica as your secondary weapon. Why? This weapon has a slow pull-out and put-away time in the first place. Pistols draw the fastest, with the M93 Raffica in second place. Using this combination will allow you to pull of close range kills a bit more often.
  

Not much more other than that, but imo this is an excellent sniper rifle. Overpowered by comparison to reality, but underused at the same time. I'd recommend this to any new players.

Didn't know about the first point. My mate used to always use this sniper rifle, and I admit its quite decent, I just hate the look of it (looks pretty good when you're holding it, but otherwise looks silly imo). But in general I don't tend to snipe that much. Good point about using the raffica btw!

i like the intervention the most, but this one gets the job done but i never was any good at sniping

The WA2000 is no doubt a great rifle, but it blocks to much of the screen for my liking. What do you all think?

Idk, it's hard to say. I dislike the M21 and WA2000 because they feel too light-duty in my hands, appearance I could care less for the most part.