Over the years I've had:
Stag model 2T
Colt 6450 (9mm)
LWRC M6A2
Spikes Tactical custom midlength

What I have now:

Custom SPR
blk/socom tigerstripe duracoat
spikes billet lower
vltor monolithic upper
geissele DMR trigger
nickel boron bcg
sabre defense barrel
ACOG with off canted reflex red dot
etc...

Custom SBR
LMT lower
Trigger job
RWMD upper
nickel boron bcg
9" compass lake kreiger barrel
8" kac urx III rail
etc...

I will put up pics later