Glock frame lifespan

I live in Israel.



Israel has a very restrictive gun carry policy,

and the government is trying reduce the number legal guns by all means.

Until so far, the government banned any replacement/repairs for owners that have a license before 1996. If your gun is broken, then you say goodbye to your license/gun forever.



Recently due to terrorist attacks, government allows replacements.



I don't know when this window of opportunity will be closed again..



Now for the question.



I have a gen-3 G-17 made in Austria, manufactured in 2004.

Serial GBLxxx, EOF on the barrel hood.



Shot ~3000-4000 rounds.



I don't worry much for the longevity of the metal parts,

as much as for the plastic.



Given the fact that there may be no other opportunity to replace - Should I replace?



Another point - All new glocks in Israel are US made.



Thanks in advance,...

Glock frame lifespan