User Westfork posted his mounted ShotLock Solo-Vault to AR15.com. The Solo-Vault mount can be configured to fit your particular gun, and opens using a Simplex lock for quick and easy access.
Ed Skoudis office includes this hidden space behind two secret bookshelf doors. The suit of armor is a nice touch to this classy, steam punk themed office.
This bookshelf door posted to GardenWeb is mounted on 3 large hinges and swings out to reveal a secret broom closet. The hinges are visible on the right hand side, so it’s not a complete secret. However, it still serves it’s purpose...