I'm pretty sure the CSS runs its own proprietary bolt carrier group
So you would need
- BCG
- Buffer tube
- Buffer
- Buffer Spring
- Castle Nut
- End plate
- Stock
Plus buffer retainer and buffer retainer spring.
GC
I'm pretty sure the CSS runs its own proprietary bolt carrier group
So you would need
- BCG
- Buffer tube
- Buffer
- Buffer Spring
- Castle Nut
- End plate
- Stock




























