JeffTron CNC Speed Trigger for M4 / M16 Series AEGs (Model: Flat / Black)

"I have installed a few of these came with JeffTron Leviathan

It's not for A trigger trolley. This is for the JeffTron Leviathan pretty much exclusively

You will lose the ability to engage safety if you have a regular trigger trolley

If you know how to use JB well you could build up a new safety shelf, but I don't know why you would. This is for a JeffTron Leviathan and the review with two stars used it with a standard trigger trolley which this is not intended for. Works great for its intended use

"Great snap and tune ability however the other review is accurate these triggers are small and my safety no longer functions

Be warned

"Works as you would want, you can tune it. However the trigger itself, is too small inside the gearbox, now my safety doesn't work, because the lever doesn't stop the trigger.