sureI don't know the answer.
My opinion is..... If the timing is tight any capable gunsmith can open it just like on a PTG one piece bolt.
I have read that there is a ex-Stiller's machinist who does mods and repairs.
Would you like me to pose the question on the gunsmithing forum?
Rick M.

WAKE UP People!! One guy just lost $550!! If you get a PHONE Text from someone claiming to be a SELLER, Do NOT SEND MONEY!! NEVER put your phone number in ANY post. Scammers pretend to be Sellers! Contact Real Seller via PM. NEVER EVER send a penny without a VOICE phone call with seller and demand custom photos.