I get what you mean, haha.
I get what you mean, haha.I have a bar10 but I had the same problem with the bolt locking up from the screw being in too tight. what I did was I took some paper and put it inside the piece the screw goes into that hold the handle in place. The paper goes in the space around the screw so when I put it all together the paper acts like a shim and keeps the end from going too far and locking the handle. I don't have the terminology for it so I hope that made sense.
I was talking about what I think is the "nub." The piece that goes on top of the hop-up arm. I was just making sure that that is where it goes because I've never seen an illustration of it before.You mean the hop up arm? Yes you can get new plastic ones or you can buy a metal one here:
http://www.landwarriorairsoft.com/acatalog/ASPUK-L96-Metal-Hop-Lever-ASPUK_L96_MHL.html#.UFgDLlIRR8F
From what I know about how the bolt is assembled, you should be able to tighten the screw without locking up the bolt handle for an L96. Also, don't worry, the screw may come loose, but it won't come out on it's own, it's a large screw with plenty of threads and it holds the rod that the spring guide sits on, it's practically impossible for it to just pop out.