These are for mid-to-long range fights (using scopes like the ACOG).
"It works well for finding sensitivity numbers, but it’s not a magic 'auto-aim' button. The recommended settings for things like the MP40 are a great starting point, but you still need to practice in training mode to get the muscle memory down. Good for reducing lag, but don't expect it to make you a pro overnight." Key Features often highlighted in reviews: real sensi ff