This mod increases the magazine capacity of the assault carbine by 6 additional rounds per magazine, from 24 to 30 rounds.
- Arms merchant, 188 trading post
- Alexander, 188 trading post
- Cliff Briscoe, Novac
- Dale Barton, the Fort
- Vendortron, Gun Runners kiosk
- Great Khan armorer, Red Rock Canyon
- Blake, Crimson Caravan Company
Prior to patch 184.108.40.2062, the assault carbine extended mags were only worth 300 caps.