I bought this for my AR 2.0 and haven't had any shaft fit issues like others. Everything in the pictures was included which was perfect. I had to replace a spur and gear but ended up just replacing everything as my friend broke it pretty badly. When I pulled out the originals they were bent so it was great to get a full set of all the parts needed. The extra clips were a huge plus. I somehow managed to just lose a new one, but I can see these things fly and never see them again. Gears appear to be thicker, but that doesn't always mean they're stronger since we don't know what they're made of. My only suggestion to other potential buyers is to purchase an AC terminal removal/installation tool. You don't have to be a trademark parrot. This was the only annoying/difficult part about replacing these parts for me.
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