Ms4r-X Rapid Fire speed.

See notes on the bottom of the chapter.

Black Ops 2:

Submachine Guns
Chicom CQB (burst 3) - Regular Rapid Fire 35sps

Assault Rifles
SWAT-556 (burst 3) - JitterYY 20sps, Regular Rapid Fire 10-35sps
FAL OSW (semi) - Regular Rapid Fire 14sps
SMR (semi) - Regular Rapid Fire 14sps
M8A1 (burst 4) - JitterYY 20-22sps, Regular Rapid Fire 10-35sps

Shotguns
S12 (semi) - Regular Rapid Fire 12sps

Sniper Rifles
SVU-AS (semi) - Regular Rapid Fire 16sps
XPR-50 (semi) - Regular Rapid Fire 10sps

Pistols
Five-seven (semi) - Regular Rapid Fire 9sps, JitterYY 20sps
Tac-45 (semi) - Regular Rapid Fire 16sps
B23R (burst 3) - JitterYY 20-35sps, Regular Rapid Fire 10-35sps
Executioner (double action) - Regular Rapid Fire 12sps

COD7(Black Ops) max speed should be 7-8sps for most semi-automatic weapons. For pistols can be up to 16sps. Jitter can be 20-35sps.

COD4/COD6(MW2) can work with any speed, but recommended speed of the game is 16-22sps. Jitter can be 20-35sps. Jitter Striker(MW2) - 33sps.

COD5(WAW) max speed no more then 10sps. If speed of the shooting will be faster then rapid fire will stop work and need out to main lobby and enter again.

COD8(MW3) can work with any speed, but recommended speed 18sps-25sps. In this game Jitter doesn't work.
MK14 recommended speed 8sps.
G36C with no recoil - 9sps.

Assault Riffles.
MK14 (Semi-automatic)
M16A4, Type 95 (Burst) Work as burst, but continuously with a small delay between shots

Shotguns
Striker (Semi-automatic)
Model1887(lever-action)
Spas12 (Pump-action)
KSG12 (Pump-actio)

Sniper Rifles
Barrett.50CAL (Semi-automatic)
Dragunov (Semi-automatic)
RSASS (Semi-automatic)

Hand Guns
USP.45 (Semi-automatic)
P99 (Semi-automatic)
MP412 (Revolver)
.44 Magnum (Revolver)
Five Seven (Semi-automatic)
Deser Eagle (Semi-automatic)
Launchers
XM25 (Airburst 20mm Grenade Launcher) Speed of Shooting Slow-Medium

BF3 can work with any speed, but recommended speed of the game is 16sps. In this game Jitter doesn't work.

Note1: Posted above is the recommended settings. These settings maybe different depending on your internet connection.

Note2: These speeds just make the weapons shoot fast as possible (as they can), but this is not meant that will be the same speed as speed of Rapid Fire. Every weapon have different response time and the same speed will shoot slower or faster on different weapons.

Note3: When adjusting the weapons shots per second (SPS) please keep in mind that if the gun is jamming, freezing, or locking up this means you have the rapid fire adjusted too high. Lower the SPS until the gun fires consistently with out jamming.

Note4: Most automatic weapons with rapid fire shoot slower.

Ms4r-X Rapid Fire speed and Quick Scope setting.

Ms4r-X Rapid Fire speed.

Ms4r-X Quick Scope setting.