Volquartsen Firearms Accurizing Kit w/No Trigger Ruger MK IV. This kit does not include trigger trigger plunger trigger return spring or trigger wrench Included Accessories: Kit fits all variations of the Ruger MK IV (including 22/45) Hammer and Sear are wire EDM Cut from A2 Tool Steel Includes allen wrenches Includes medium strength loctite Specifications for Volquartsen Firearms Ruger MK IV Accurizing Kit w/No Trigger: Manufacturer: Volquartsen Firearms Color: Black Gun Model: Ruger Mark IV Condition: New Country of Origin: USA Gun Type: Pistol Package Contents: Volquartsen Firearms Ruger MK IV Accurizing Kit w/No Trigger What firearm models does the manufacturer say Volquartsen Firearms Ruger MK IV Accurizing Kit w/No Trigger is compatible with? The manufacturer says that Volquartsen Firearms Ruger MK IV Accurizing Kit w/No Trigger is compatible with Ruger Mark IVVolquartsen Firearms VC4AK-NT: Accurizing Kit w/No Trigger Ruger MK IV