Metal Gear Solid: Peace Walker/Extra Ops

[001] Target Practice: No Limit
Mother Base Shooting Range

There isn't much to this mission. Your weapons will have infinite ammo and you have all the time in the world to practice shooting. If you're not comfortable with the gunplay, you can either leave at the orange goal area or you can practice on infinitely-spawning paper targets.

More interesting than all that, however, is what's up on the second floor of the range. Climb upstairs and check out the catwalks. You'll find the T-shirt, a plain white tee that you can wear on missions. It doesn't affect defense, speed, or ammo capacity, but it does significantly reduce Camo Index in all environments compared to the OD green Jungle Fatigues. It does look comfy, though.

This mission is unranked, which means that it does not add progress to any of your development projects or count as time spent completing Outer Ops. You can always return to this mission for unlimited target practice to sharpen your gunplay. It's a good idea to come back to this mission if you're not sure what to do to advance the plot.

[003] Target Practice: Score Attack
Mother Base Shooting Range

You have 3 minutes to shoot as many targets as you can. The number of targets is unlimited. S-ranking this mission is dependent on accuracy rather than time; miss one headshot and you lose the S-rank. Roughly 23,000 points is what it takes to get the S-Rank. It is suggested you be very comfortable with the gunplay and have a highly accurate, highly-upgraded weapon such as the M16A1 or the FAL with a laser sight. An S-rank on this mission will be very late in the game.

However, if you're playing the mission just for the checkmark, you can stand in front of the firing line while the timer runs out without firing a shot and still get a C-rank and even a bit of heroism.