I'm looking at a Knight Original Disc in .45. Attached is a pic of the breech area, it does not have a nipple, just the plug with threads for a nipple. Is this the Western Legal Breech Plug? What type of nipple would it use? What is needed to make the gun fire 209 primers using orange discs? Can it use newer red FPJ? Also, does it cock the same way the LK-93 does....pull back on the rear of the bolt? Thanks for any assistance!!