These first "violent encounters" with other airplanes were a little bit crazy. Some pilots shot pistols, some used 2-barrel hunting shotguns and some others even threw bricks. That is correct... they threw BRICKS at each other! There is even stories of wacky pilots taking to using medieval-like slings and throwing stones. Like David versus Goliath!
Machine gun doesn't work because I didn't code one in. I didn't realize there was a forward firing MG mounted next to the pilot and forgot to include it in the code!