Volquartsen HEAVY Recoil Spring VC3RSO-H Ruger Mark 1 2 3 4 22/45 & LITE MK IV

Volquartsen STANDARD Recoil Spring VC3RSO-S Ruger Mark 1 2 3 4 22/45 LITE MK IV

Factory RUGER Safety Detent Plunger Mark 1 2 3 MK II III MKI MKII & 22/45

Ruger Mark IV Magazine Assist Ejector Spring FOR Standard METAL Frame MK 4

RUGER Mark IV Recoil Spring Assembly Extractor Firing Pin Mk 1 2 3 4 22/45 LITE

RUGER Mark IV Recoil Spring Assembly & Extractor Mk 1 2 3 4 22/45 LITE OEM

Factory Ruger STRIPPED Mark IV 4 Bolt Blued fits 2 3 & ALL 22/45 & ALL LITE

FACTORY RUGER Standard Power Mainspring Mark 1 2 3 4 MK I II III IV LITE