An unused S&T shocker trigger. From their website:
You’ve used a Rocker Trigger on a paintball gun, now use a SHOCKER Trigger on your AR!
Use two fingers to “rock” the activator (trigger) back and forth to fire each time one of your fingers moves rearwards. This unique design fits right over your existing Mil-Spec Trigger (not included) and does NOT force any reset, use extra spring-assisted power, fire “bump” style or in any way turn your AR into a machinegun. This simply lets you use a second finger to bang.
Installation is easy: remove your trigger guard, put the Shocker in its place… and… well, that’s it.
This particular trigger is one of the ‘curved’ ones, and comes in the original packaging with mounting hardware and the trigger itself. I am asking $40 ($10 below the new price from their website).