a part that used to be sold for mini14 that would allow the rifle to fire when the trigger was pulled and released.Almost a two shot burst.I am sure they are probably illeagle now,but would be cool for an ar,especialy If you could move the selector for it.As I remember when it was installed in the mini,it fired like that all the time.

That would be cool, but that would be 2 rounds per pull. Breaks the semiauto rule/law (whatever) doesn't it?
Isn't 1 pull considered the cycle of pull/release?

That would be 2 round burst.
Too bad, that sounds like fun!

There was a trigger actuator offered at one time called the Ultimate. It was a pistol grip that replaced the one on an AR-15. It had a long lever that you pulled like a trigger. This lever would trip the trigger on both the pull and release strokes, firing two shots per pull of the lever.

There was also an actuator called a B.M.F. Activator that had a crank like a pencil sharpener. You hooked it to the trigger guard of a rifle and cranked it like a Gatling gun.

Another one was called the Hell-Fire. It also fits on the trigger guard and reduces the pull of the trigger. Recoil causes the shooter's finger to trip the trigger every time a shot is fired. It is very similar to "bump firing".

All of these products are legal, but may be hard to find now.

That ar pistol grip thing sounds cool,but this was something only for the mini as I remember,that fit inside the trigger assembly.It was advertised in guns and ammo probably 12 to 15 years ago as I remember,and I read a write up on it in the american survival guide as I remember.It was probably a little to close to the real thing for uncle sam to trust to the unwashed masses..So what is the best trigger atachment for simulated auto?Never was to good at the bumpfire myself.Anyone hear of something called trifire?Supposed to let you fire 3 rnd bursts from the shoulder.