I'm taking the liberty of uploading all 3 metal maps in a zip file along the proper file-uploading guidelines to make it easier for people (ie not downloading the wrong version and making it easier for people)
Title: Acrobat-Metal , Acrobat-Metal2 , Acrobat-Metal3
Release date: Metal1+2 = May 15th, 2012 ... Metal3 = December 14th, 2016
Description: Iconic 1.04 racing maps created by Acrobat. Known for lots of space and many different possible routes. Metal has become an icon not only for JK2, but for JKA and Quake3 as well.
I really don't feel like uploading screenshots, so here's the Metal video I made:
THIS MODIFICATION IS NOT MADE, DISTRIBUTED, OR SUPPORTED BY ACTIVISION, RAVEN, OR LUCASARTS ENTERTAINMENT COMPANY LLC. ELEMENTS TM & LUCASARTS ENTERTAINMENT COMPANY LLC AND/OR ITS LICENSORS.