the.com/firearm
A tube that turns gunpowder's tantrum into a very persuasive argument.
means A portable weapon that uses an explosive charge to launch a projectile at high speed down a barrel.
from From fire plus arm, with arm meaning weapon from Latin arma; the fire half is literal, since early ones were touched off by flame.
Rifling trickSpiral barrel grooves spin bullets for straighter flight.
Chinese debutFirst firearms appeared in 13th-century China.
Caliber meansBore diameter, often in inches or millimeters.