Complex sentence: Israeli Channel 10 reporters built and tested the gun with a 9mm cartridge, successfully hitting a target at a distance of several meters; during the firing the barrel disengaged from the receiver and broke in half.
Split into simpler sentences: Israeli Channel 10 reporters built and tested the gun with a 9mm cartridge, successfully hitting a target at a distance of several meters. During the firing the barrel disengaged from the receiver and broke in half.