Want to make your Ruger Mark III or 22/45 LITE magazine drop free? The TANDEMKROSS Hammer Bushing for Magazine Disconnect might be the best $10 you spend on your gun. Video: Installing a TANDEMKROSS Hammer Bushing in a Ruger Mark ...This entry was posted in Guns Product Reviews Videos and tagged 22/45 22/45 Lite bushing Mark III Ruger Ruger MK III TANDEMKROSS Upgrade on April 26, 2015 by Steve Jenkins