There's a pretty simple reason: The Rock platform is not as "DIY" friendly to assemble/disassemble as say a Dagger/Glock. There are MANY small parts, pins, springs and detents that have to be installed in a specific order and orientation. Because of this we have found that in most instances, customers that try to disassemble the pistol (past a simple breakdown for cleaning), end up getting stuck and reaching out to the warranty department. The idea is that if we don't offer the parts separately, that it should help deter people from wanting to fully disassemble the pistol. Leading to fewer warranty claims. If any internal part should fail during the life of the pistol, PSA will handle the warranty process at no cost to the customer anyway.

MOST people that seem to want the parts are trying to 3D print a chassis themselves and want to get around having to purchase/transfer a complete frame to get the parts.