That broken GSG slide is made of aluminum not pot metal. If I remember correctly what I read about it, it broke after only a few rounds through the gun and was chalked up as a manufacturing defect.
I have well over 10,000 rounds through my GSG 1911(I stopped keeping track of exactly how many once I passed 10,000.) Mine runs just about every ammo I've tried in it very well. I've only had a few minor problems with mine:
Zinc barrel bushing broke after a couple of thousand rounds--replaced with a steel barrel bushing(the newer GSG 1911's come with a steel barrel bushing.)
Head of the barrel fixing screw stripped out--replaced with a screw I picked up at the local hardware store for a few cents.
Recoil buffer worn out--replaced with a faucet washer sanded down to the proper thickness.
A couple of people who post on Rimfire Central are nearing 20,000 rounds through theirs.
I have well over 10,000 rounds through my GSG 1911(I stopped keeping track of exactly how many once I passed 10,000.) Mine runs just about every ammo I've tried in it very well. I've only had a few minor problems with mine:
Zinc barrel bushing broke after a couple of thousand rounds--replaced with a steel barrel bushing(the newer GSG 1911's come with a steel barrel bushing.)
Head of the barrel fixing screw stripped out--replaced with a screw I picked up at the local hardware store for a few cents.
Recoil buffer worn out--replaced with a faucet washer sanded down to the proper thickness.
A couple of people who post on Rimfire Central are nearing 20,000 rounds through theirs.