Comparing the Glock 21 and 21SF? Discover key differences in grip size, specs, and performance to find out which .45 ACP Glock fits your needs best.

Compare the Glock 43X and SIG P365 for concealed carry. See key differences in size, capacity, and performance to choose the right pistol for your needs.

This alignment is not just a fascinating visual display, but a line-of-sight illusion. The moon is only about 226,000 miles away, whereas the Pleiades is located a staggering 445 light years from ...

Shooting for accuracy isn't easy. It's takes practice, skill, and knowhow. Follow these 20 expert tips to become a better marksman.

This paper investigates the impact of spectrum distribution on the device optimization of n-i-p solar cells using band-alignment analysis. Band-structure has been optimized for three standard spectra: ...

An aerial Fire Control Radar controls the aiming, movement and fire of one or more guns on a flying target when they are spatially separated. To calculate the bearing and elevation angle of a gun, the ...