Once you have the bolt out of the receiver there are two firing pin retainer pins on top. One at the front, and one at the back. Roll the bolt over on it's back, and tap these two pins out, and the firing pin assembly should slide out the back to the bolt. Careful not to loose the flat firing pin spring. Once that is done, you can check for breakage,or crud buildup in the firing pin channel of the bolt. If you cant do that, pm me with phone number, and I will either try and walk you thru it, or send you the schematics and instructions.