FOR ALL YOU HE BOLT USERS!!
I have decided to take pics on how to take your bolt out as...well...the first post = stock SFT bolt.
Go up to about step 5 and go from this:
As you can see there are two parts to the firing can. You can remove the top piece by simply pulling up on it, Like so:
That o-ring is the one you need to remove before you can full take your firing can off of the bolt. Remove it with a dental pick or small flat head screwdriver.
Slide the firing can up and take it off. You now have access to the inner back firing can o-rings.
Should be basically all the parts after you're full disassembled (besides the hybrid bolt guide of course.