- Yes for most glocks, although there are some glock models that do feature a manual safety.
- Glocks have a half cocked striker once you rack the slide, and this gives a factory glock a trigger pull weight that is directly in between a cocked single-action trigger and an uncocked double-action trigger.
Glock’s trigger safety is more secure than no safety although it is not as secure as a thumb safety, and the half cocked striker is easier to pull than a double-action trigger but is harder to pull than a single-action trigger.
Presumably this compromise was intentional and is one of the reasons why Glocks have become popular through their balance of reliability and ease of use - nowadays most striker fired pistols follow the same design principle.
Yes, since there’s no way to fully cock the striker, you always get the ~6lb half cocked trigger pull weight every time.