There was a download of AirGun 7.5.2 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The program's installer files are commonly found as AirGun.exe or AirGun75.exe etc.
AirGun lies within Office Tools, more precisely Calculators. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. You can launch this free PC program on Windows XP/7/8/10/11 32-bit. The most popular version of the software is 7.5. The actual developer of the free program is AAFTA.
From the developer:
This software supports feet and metric units. Note that the Chronograph uses 2 decimal places of accuracy.Since 1/100fps is smaller than 1/100mps metric units are not as precise as for Chronograph analysis. Toggling between feet and metric units may cause some rounding out of value.
You may want to check out more software, such as OC Conversion Pro or CelsiusConverter, which might be similar to AirGun.