ICS - CXP-MARS SBR MTR Stock S3 - Black

- Lightweight Key-mod Handguard
- ICS Split Gearbox
- QD Spring Guide
- One-piece Metal H-UP Chamber
- EBB System
- ICS 3S E-trigger system
- Safety to Release Spring Function
- 420FPS
- Ambi selector
- Ambi magazine release