"Come and take it" is a historic slogan, first used in 480 BC in the Battle of Thermopylae as "Molon Labe" by Spartan King Leonidas I as a defiant answer and last stand to the surrender demanded by the Persian Army, and later in 1778 at Fort Morris in the Province of Georgia during the American revolution, and in 1835 at the Battle of Gonzales during the Texas Revolution.
This slogan is quite popular for supporters of the United States 2nd Amendment, which grants its citizens the right to bear arms and form a militia. Those who call to this message shall not be taken lightly and will not lay down their arms without a fight. Where better to visually adorn this phrase but directly on your weapon of choice? Your move.