Introducing holsters in Mine-imator 0.7, haven't seen a rig on these, so yeah, here is one
If this proves helpful or cool in anyway please wack the button with a baseball bat.
Download: http://www.mediafire.com/download/wke966babxmqjw9/Weapon+Holsters+Rig++Mine-imator+0.7.zip
Gun rig by ÜberKiller: