Not that we're aware. We tested extensively with a SCAR chambered in .308, a firearm configuration known for being harsh on attached devices, and experienced no failure. We've seen customers attach it to a .50 BMG, shotgun, etc. and operate without issue.

Not that we're aware. We've had it attached to numerous short barreled firearms without issue, and so have our customers. We have a shield above the unit that helps deflect the blast.

Simply unscrew the hose fitting from the UBF reservoir and thread it onto the included 37 degree male-male adapter. Now you can follow the same instructions that come with the backpack kit - just thread one of the backpack kit's hose ends onto the adapter instead of the fuel pump.

No. The overall housing and fuel tank are welded as one unit.

In order to comply with regulations and avoid requiring permission from the state fire marshal, pyrotechnics license, etc., the Pulsefire LRT was offered with a short range nozzle for California customers. See more details here.

Unfortunately, the same nozzle installed on the Pulsefire UBF results in a very hot flame right by your hands. It is not a comfortable experience. Thus, we made the decision to not sell the UBF in California. You can always install the short range nozzle yourself if you have a standard UBF and want to feel the heat.