Glock
I spoke with Jon Green (Goal president) last night, and suggested that the best approach is for to present Glock legal with a detailed analysis as to exactly why frame replacement is legal, a covering the three perceived obstacles: Federal law, state law, ag regs. I have offered to create the first draft if GOAL will have an attorney who happens to be on their board (you know who you are - *) tweak it for any needed correction, draft it on law firm letterhead, make an attorney to attorney presentation, and have the MA lawyer available if the Glock legal staff has any questions.
As with any negotiation with someone you are asking to change their policies, the best approach is to have a well prepared, accurate and professional first presentation. Phone calls and attempted telephone negotiations by well meaning amateurs will not help. An accurate and detailed case from a member of the MA bar might.
Glock is a great company, but does not understand the nuances of MA law. For example, their "recall letter" on guns sold which the AG later retrobanned states "these must be returned" rather than "we have been pressured to recall them, but you committed no offense in purchasing them, and are under no legal obligation to return them".
* Thanks for showing up at the AFS shoot.