The RTT™ is a DLC (Direct Laser Sintered) 3D printed stainless steel tool that allows the user to remove the rear takedown pin on an AR15 receiver without having to un-stake and remove the Castle Nut & End Plate.

The tool is inserted into the slot on the rear takedown and features a ramp that allows the detent to ride up and out of the channel onto the outer diameter of the pin. The pin can then be removed and a Pivot Pin used to hold the detent back while a new pin is inserted.