I was working on a couple of bike projects at the same time...
The frame is from eBay, back when they had Chinese fixie frames for $150...
I restored an old Haro 24" cruiser, so I had a bunch of BMX parts sitting around.
The bars and stem from this fixie came from the Haro, not pictured here, but I eventually put the 3 piece cranks that came with the Haro on this bike too... and I had the tri-spoke wheels from another build. I also had some knobby tires from a cyclo-cross bike I built, and used them here instead. Front brake was a gift from my local bike shop, it was sitting in a box and they said I could have it... rear brake came from an old 70s 10 speed bike that I stripped and gave away.