Why do we have to keep telling people this......
Buy quality parts the first time and you don't have to worry about anything!
I have well over $1K into my TM L96, but I also know that those parts are going to hold up to the test of time. And there is nothing in my rifle that I am going to have to replace due to them breaking. The only time I may need to replace something is if I want to change something out with something else.
You can spend $50 on aluminum sears, or you can spend $150 on a set of quality CNC steel sears. What part is going to last longer in a high FPS rifle? Well that is a no brainer, the steel will by a long shot. But you can use the aluminum for a time, and then need to replace them. And while you are waiting for parts, you can't use the rifle....... while my steel sears are working great and I can be out playing.
Yes it may be spendy at first, but you pay for quality. And you get what you pay for. So don't skimp out on something that you don't want to get. Go for the good stuff and spend your time out on the field playing, not back at your house working on a broken rifle.