For just £395 (~$670 USD) you can get yourself this amazing life-size laser rifle from Fallout 3. You might recognize it as the Wazer Wifle, which is a unique version of the AER9 laser rifle. It was made with wood and fiberglass by Thomas Hughes.
This is a super nice replica of the rifle in the game. I’m not sure if you will do any damage to your enemies, but at least you will look the part when wandering the wasteland. The seller says that is about 95% accurate to the in-game model.