Extended Magazine is very important due to the low capacity of ammo per magazine, but does make your reload slower.
Suppressors reduces the recoil of this gun, useful in CQC (Close Quarter Combat ), but not really compulsory, because if you bought the Extended magazine you can just rapid press.
Scopes are really unnecessary, because the gun itself have a huge recoil when scoped in.
2. Last Man Standing.
This pistol is amazing when it comes to Elimination Pro, SnD (Search and Destroy) or Last Man Standing (When there's only you and one other person) when you are the last man in any of this mode, you can easily pull out this pistol and aim at them (Be sure they're on low, ask your team mates.)
3. 2 won't hurt.
This gun has such a amazing power, but low on the ammo, so it definitely won't hurt if you bring M92FS or buy another pistol to back you up in pistol only games.
4. Practice makes perfect.
Practice, Practice and Practice. When you can get better you should be able the kill enemy in a few shots without missing, or even get head shots.
This is just for all the people the bought the pistol permanent and think it sucks.
If this doesn't help you I am sorry.