Here is a list of all the items that have been tested and confirmed to work with the SUB-2000 CQB:
- All Internal SUB-2000 Upgrades
- Rapid Deployment Latch (RDL)
- Buttstock Pad
- All 3 Charging Handle Options:
- Bolt Tube Cover (It might be a little tight when folding the firearm but it fits)
Here is the Bad News...
Unfortunately the Muzzle Brake, Optic Mount, Rear Folding Sight and Shell Deflector will NOT fit/function with the KEL-TEC SUB-2000 CQB.