So, I have a Daniel Defense lower receiver that had an RRA LPK installed (back when DD sold stripped lowers) and a commercial buffer tube/stock.
I wanted to switch it to mil-spec so all my AR's had were mil spec for ease of swapping parts etc.
I uninstalled the commercial buffer tube no problem.
Then I tried to install a new mil-spec tube along with an ASAP plate (which was previously on there). No matter how many times I tried, the buffer tube came out crooked once I torqued to 32 ft/lbs
So I tried a SLAP plate and a new buffer tube instead, same problem. Then I tried a third buffer tube, same problem.
I've installed LPK's and buffer tube assemblies in several lower receivers and never had this problem. But no matter what, I can spend hours trying and it turns out crooked no matter what I do.
I have a proper bench vise, lower receiver vise block, torque wrench and castle nut wrench and then a little hand castle nut wrench. So I'm not using crappy tools or some poor improvised setup. I looked at the threads in the DD receiver and don't see anything stripped out or any apparent damage.
What gives. This is driving me crazy