Grumpy Old Guy
If it did not come with the Glock it is not needed. I have used one and it caused a few feeding problems.
Depends on how you feel about getting rid of as much recoil 'clanking' as possible (aka slide bottoming into the frame) without having to reduce your loads. I'm more critical of that than I am the frame actually being hurt. The softer you can get the slide to hit the frame, while still having good ejection, the faster you can shoot, accurately. For the price, it's worth at least a try.Would they mainly just be another way to transfer money from my pocket to the seller?