The Cadets are fine Guy, The breech is milled from a solid bar I think, The Meteors (At least from mk3 onwards) are almost tinplate at the breech, It's pressed sheet steel that seems to be brazed together, They're bad for opening at the jaws as the stock screws pull them apart when tightened because the screwholes are directly below the jaws!!

This pic shows how they're hollow at the breech if you look through the pin holes!, I tried clamping this one years ago with the barrel in place and it squashed the jaws!!


Have to say, I hate the Meteors for the cheapness and bad quality although i've not witnessed this with my mk1 and mk2

Also, It doesn't happen with the Mercury's as I think those are solid at the jaws!


John