Wiktionary
unrifled
a. (context firearms English) Having a bore with a smooth interior, i.e. one that has not been rifled
WordNet
unrifled
adj. of a firearm; not having rifling or internal spiral grooves inside the barrel [syn: smoothbore] [ant: rifled]
Usage examples of "unrifled".
I am stripping our artillery of all the smooth-bore, unrifled cannon that can be found.