An example would be these bench blocks which not only support a workpiece but also have cutouts specific to firearms to make life easier.
Wheeler universal bench block box opening review
TFB Armorer's Bench: Closer Look - Wheeler Bench BlocksThe Firearm Blog
At the Armorers Bench: The Not So Universal Bench Block - The Mag Life
Wheeler Engineering AR Armorer's Bench Block
At the Armorers Bench: The Not So Universal Bench Block - The Mag Life
TFB Armorer's Bench: Closer Look – Wheeler AR Receiver Lapping ToolThe Firearm Blog
TFB Armorer's Bench: 2021 TFB Armorer's Bench Wrap UpThe Firearm Blog
Guns – The Armourers Bench
TFB Armorer's Bench: 2021 TFB Armorer's Bench Wrap UpThe Firearm Blog
Wheeler Universal Bench Block Review and Use - Colt 1911 + 10/22 and more - Gunsmithing Tool
Video – Page 5 – The Armourers Bench