This mod increases the rate of fire for the service rifle by 30%, thereby increasing the shots per second from 4.2 to 5.46. Its use can somewhat mitigate the effects of the trait Trigger Discipline.
- Alexander, 188 trading post
- Arms merchant, 188 trading post
- Blake, Crimson Caravan Company
- Cliff Briscoe, Novac
- Dale Barton, Fortification Hill
- Great Khan armorer, Great Khan armory in Red Rock Canyon
- Vendortron, Gun Runners kiosk
Prior to patch 126.96.36.1992, the upgraded springs were only worth 100 caps.