wind drift,
Depending on what year your Disc Extreme was manufactured, will depend on what bolt you have. I presume it is the C-Tooless bolt.
The easiest way to describe it is to grasp the bolt (CHROME PART) in your left hand, turn the secondary safety all the way in with your right hand, once you bottom that out, rotate the back portion (BLACK PARTS) clockwise up out of the notch, as soon as you get up out of the notch, there will be a small detent in the back of the chrome bolt, there will also be a rounded protrusion in the black part. Line these up, while holding them in that position, slowly unscrew the secondary safety until the firing pin spring settles the protrusion back into the detent. Now it will go into your rifle and function properly.
If you want to take the bolt apart for cleaning, you just tighten the safety back down all the way, which releases the protrusion from the detent, then just rotate the whole black parts counter clockwise and it will unscrew from the bolt body. To re-assemble turn it back in clockwise, until the protrusion again lines up with the detent, then hold in position while backing off on the secondary safety screw. It is real easy once you have done it a couple times.
If I didn't explain it well enough, it should be on either page 13 or page 30 of your Owners Manual.
Or go to this link and pick out your Owners Manual.
http://www.knightrifles.com/instructionmanual/defaultIt will be on page 30 of this owners manual, see photo #2.
http://images.ebsco.com/pob/knightrifles/catalog/8_07_complete_web.pdfThese are the instructions, you will have to download the PDF to see the pictures.
DISC C-Toolless Bolt Removal and Disassembly
When you are ready to remove and clean your bolt, follow this procedure to avoid misalignment
problems.
With the rifle bolt handle in the up position, while pulling out on the spring loaded
Quick Release bolt screw (Photo #1 - Letter A), pull the bolt out of the receiver.
Turn the secondary safety clockwise until the cocking piece (Photo #2 - Letter B) is
drawn up against the front edge of secondary safety. (Photo #2 - Letter C)
Unscrew the striker assembly counterclockwise, until it is free from the bolt body.
(Further disassembly is not required; doing so may result in your having to send the
bolt back to be reassembled.)