This mod adds a few blocks I think they should've added into the SCP: Lockdown Mod. This mod mainly adds decoration blocks.
This mod was created for the Site-21 Minecraft Server Community by the Engineering & Technical Department. We are no longer affiliated with or by them.
Disclaimer: I know this mod has been out of date for a long time and isn't compatible with the current version of SCP Lockdown, But I will hopefully release a version eventually which will work with the newest releases of the mod.