3928 has used Stainless Steel Snap latches (found on McMaster
here) since 2013. At around $6.00 a piece, they aren't cheap, but make for very quick bumper attachment and removal. They are attached to the bumper by an L bracket. The latch slides over a spacer on a 10-32 bolt that is on the frame. This makes them fairly adjustable. Taking bumpers off or on takes less than 10 seconds for two people.
