Building an AR 15 input please

[Gatorade]

Originally Posted by Arley

What does this mean ? Staked M4 Lock Nut . Not familiar with this from my DPMS I had .

Probably the castle nut on the buffer retainer. Mil spec is to stake the retaining nut on the buffer so it won't rattle loose. If you are never going to replace the buffer retainer or the buffer then it won't hurt. None of mine are staked but I also only shoot at paper and am not running and gunning.