Standard size replacement for the extended magazine release that comes on factory Ruger MK IV Hunter models

Designed for AR15/M4 and AR10/SR25 platforms

broken magazine springs

Large: Marlin / Henry Rifle Calibers: in calibers 30-30

V-Lock Retainer Spring für Ruger Mark IV Serie Topseller Standard size replacement for theHaving issues with the Bolt Stop Cross Pin walking out of your MK IV frame during heavy use? Our all new V Lock Retainer Spring provides positive retention of the pin so that it can't drift out on it's own, but without impacting your ability to take apart the pistol. Replaces part # 41 on the Ruger MK IV and part # 37 on the Ruger MK IV 22 45 The hammer will need to be removed from your pistol in order to install this part Installation instructions