Breech # 1701p-014, you also need tray #1700-001 w/screws 1700-022 x2 , fits airtube #1700-001, breech bolts to tube #1700-008 x4.
Barrel is for a FX 400 Royal, and came from Air Guns of Arizona, the O.D is 14mm and has to be turned down to 7/16" or .435" to fit Crosman breech, you only need to turn down the portion that goes into the breech, unless you want it to match Crosman.
Hunter, how do I find the DIRECT link to post pictures?