Not only does Magnetospeed make the industry standard in barrel mounted chronographs, they regularly release products you’d never expect, like the new Riflekühl, a detachable barrel fan.
There isn’t much information on the Riflekühl yet, but they did say this about the batteries.
We wanted to clarify a few concerns about the battery life. The listed 3+ hours of run time, is the expected continuous on time from the included battery before there is any decrease in performance. After that the unit will continue to operate for several hours with decreasing airflow. Based on much of the testing we have done, which will be released in the future, we anticipate easily getting 50 “cooling sessions” out of the included CR123 Lithium before needing to be replaced. We appreciate all the interest and look forward to getting these on the market soon.
Look for the Riflekühl and other great stuff from Magnetospeed at SHOT Show.
Probably better than the air compressor nozzle shoved in the chamber like we did at my old job.