Originally Posted by
rsilvers
AAC has picked every part on that rifle - so many of which were custom designed by me and several other people at AAC.
This bolt was assembled at AAC in GA, not DPMS. It was also not machined by DPMS. The "D" has no relation to DPMS whatsoever. It is a letter code for the machine shop that made it, and we QC the bolt components that we get from them to our own drawing. Someone at AAC simply made a mistake, and didn't push the pin in far enough. It is a high quality bolt and a good choice to continue using it.