pj150
NES Member
I took apart my Colt AR for a bit of cleaning and found that the rear take down pin now falls out quite easily. There is a channel in the pin where I guess something fits in there. I looked it up and saw that I am missing an 'indent' or 'detent' pin. I will need to obtain one but do these use any kind of filler to hold it in place? It looks like it may be a friction fit but I'd like to ask to be sure.