can i zoom in?

i watched a video when some one said the Barricades is not rendering on his screen. so the other guy said just zoom in.
is there a way to zoom in? i saw him in the video zooming in but i just dont know how.

[editline]27th February 2014[/editline]

any body?

you use a holo sight, when its attached to the m4 it has the best “zoom”

i know that. but im sure that there is another way. he just zoomed in. im quite sure he didn’t edit it.

Not to sound like a dick but have you tried asking the person who posted the video what he did?