I think it´s no special steel(sheetmetal 1mm) it has 3mm holes and a surface out of Zn, i use what i got !!!
I combination with fiberglas it´s a very strong construction.
Only the Releasetrigger is made of Aluminum.
I like them too !!!
Yeahhh you´re right the only good thing about the stock grips is that the holes fit !!!
Thanks !!! Yes if, i would use a DAM Magholder but i saw on your(s) build that there is not much space inside the triggerguard so i changed my plan !!!
And saved alot cash i think i spend may 10€´s for my build and some time.
I´m not a big fan of F...book so i didn´t see !!! Thank you too !!!
There are the final pics(sorry for the bad finish surface but function is more important i think):