Does not pivot on the pin. The function of the lower is fine. Safety works. sear disengages the hammer Etc. I got the spring and plunger in the T/S. ps: What a royal pain in the ass that was. It is a new DSA H/T/S. The sear just does not pivot. Could it be that they just have to be broke in or do I need to tear it down again and use some emry cloth on them. Also charging the hammer once the sear engages you can see the hammer jump alittle forward because or the hammer plunger. My other DSA STG58 does not do that

You may have a small burr on there somewhere.  I make a slave pin from a small piece of ink pen cartridge to hold the sear in place. The sear pin will push it out the backside of the lower as you install it. This makes installing the sear/trigger very easy to do.