"I think you'll get a lot of use out of that gun. " Hogy fordítanád, mit jelent?

A sokat fogod használni ez lenne:

I think you'll make use a lot of that gun.

Ez a "get a lot of mileage out of" egy változata, ami azt jelenti, hogy sokat használni vmit.

Free Dictionary:

get a lot of mileage out of something :

Fig. to get a lot of use from something, as if it were a car. Bob always got a lot of mileage out of one joke. I got a lot of mileage out of my TV before it broke down.