R-infinity accelerator
An r-infinity accelerator is a powerful, portable weapon which draws energy from the degenerate core of a dead star. It is seemingly one of a class of "critical mass weaponry", of which it is the only revealed type.
The accelerator's barrel has a central, conical device surrounded by six smaller cones. When powering up, plasma trails from the outer cones in a display similar to that produced by Tesla coils. The weapon discharges several intertwined blue-white beams. When the beams strike a stone or concrete floor, they sound like "ba-da-doooom!"
For a being of around median Cybertronian size, the size of the weapon means it is best fired from a shoulder-mounted posture. Presumably smaller species will have to purchase some sort of stand or mount at additional cost.
Fiction
IDW comics continuity
Swindle was selling critical mass weaponry, presumably including r-infinity accelerators, to the inhabitants of various planets when Ultra Magnus tracked him down. In a confrontation on Zull, Swindle fired an accelerator at Magnus, but missed. He was soon captured. Spotlight: Ultra Magnus
Notes
- It is unknown whether the weapon acquires its energy through an intradimensional link like Megatron's fusion cannon, or if the weapon is literally powered by a small stellar core fragment housed inside the device. It is also unknown whether the collapsed star in question is a white dwarf or a neutron star. Since both types of degenerate matter are extremely dense and hot, it may be that the r-infinity accelerator can be powered by either.