- CMMG 9.5" Dedicated Bolt & Barrel (NOT A CONVERSION KIT)
- CORE 7" M-LOK Free Float Handguard, Black Anodized 6061-T6 Aluminum
- CORE Mil-Spec Forged Upper receiver, Black Anodized 7075-T6 Aircraft Grade Aluminum
- Forward Assist Filler Plug
- Standard Bird Cage Flash Hider
These uppers are a dedicated .22LR platform and are not capable of accepting different calibers with different bolt carrier groups.