The Broken sentry bot toy is a miscellaneous item in Fallout: New Vegas.
When you break the moving toy, you get a broken non-moving toy version. When dropped out of your inventory, the toy goes into the primary stance. When picked up the toys arms fall down and is apparently as heavy as a normal sentry bot's, because the toy will not come off of the ground.
It is only available via console commands on the PC. 140ca6, Broken: 140ca7. The sentry bot toy (and broken) was cut from the final game.