All According to Plan - Halo CE Chevo not working

ok maybe im doing something wrong but i swear its not popping do i keep on trying i remember this being bugged a long time ago. is it still like that or?

The achievement’s been fixed since the Halo 4 update, best shot is following a guide.

> 2535413570700474;2:
> The achievement’s been fixed since the Halo 4 update, best shot is following a guide.

Yes I got it I ended up putting on legendary and bandana and grunt funeral and just naded everything super far away from me and sniped anyone left super far away and it worked