I don't know anything about their 1911s, but their cs-9s are junk. They forgot to put a part in mine and the ham.er would fall hitting the primer of the chambered round when you used the decocker. Damn near shot my leg and did shoot through the wall and into my Harley one day when something went bump in the night. They apologized, never did send me the money for the battery on my Harley. I don't know if I would trust anything with gsg on the side of the slide after that horrific experience. Scared the **** out of me.
After I emailed them, it took several weeks to get a reply. Customer service sucks too.