The task given is to bring Sidorovich the following artifacts: Spring, Shell and Battery.
Upon delivering the artifacts, the player may choose one of the following rewards:
- 30000 RUz
- 5.45x39 BP x 12
- 5.56x45 AP x 12
- 9x39 SP-6 x 12
- 7.62x54 BP x 15
Likely an oversight, after you complete the quest, you recieve one more Spring, instead of giving it to Sid.