Emmet keeps a yard full of bottles and a table of pistols, and Sweet sends Carl and Big Smoke over to get the first of the second. The mission is the game's shooting tutorial and it is honest about it: crouch, hit the bottles, then put a round through a car's fuel tank with manual aim to see what that does.
The second half is clothes. Grove Street is green, Carl is not wearing any, and the mission does not end until he has been into Binco and fixed it — the same lesson the barber shop taught two missions earlier, applied to gang colours.