Build list:

Gloss black moly resin.
TiN PVD plating.
Custom extended charging handle.
Nordic Comp +2 mag extension and mag spring.
Welded on picatinny rail, LPA rear sight.
Custom machined tritium front sight.
Custom extended mag disconnect (makes slug-select a breeze).
Lengthened forcing cone.

All work done by myself, except for the TiN Plating! And purists fret not, I have an all original Auto 5 dated to the 1920's which I'm leaving alone!