Bf2142 extract to addon's folder to use them and enjoy the addons :)
These are some guns and stuff from BattleField 2142,For instructions just follow the steps below.
1.Once downloaded,You should have a .zip file,Download winrar to open this if you dont already have.
2.Right click the .zip and click open.
3.Once it is open,Drag and drop the folder into(step 4)
4.(Local Disk (C:),Program Files,Steam,steamapps,YOURSTEAMNAME,garrysmod,garrysmod,addons.
5.Once this is done,Launch garry's mod,And Tada!You have the addon.
:),Enjoy the addon,i have like 100 addons so look forward to more.