adjunrifledof a firearm; not having rifling or internal spiral grooves inside the barrel
Century Dictionary and Cyclopedia
unrifledNot rifled; not robbed; not stripped.
Chambers's Twentieth Century Dictionary
adjUnrifledun-rī′fld not rifled.
Soon, while the crews were awaiting the arrival of the ship, the body showed symptoms of sinking with all its treasures unrifled.
"Moby Dick; or The Whale" by Herman Melville
Not a desk or a drawer was left unrifled, not an article of furniture unmoved.
"Dorrien of Cranston" by Bertram Mitford
SIGISMUND. Pursue him then,
Leave no single shrub unrifled,
Nothing must escape your search,
Not a plant, and not a pine tree.
"Life Is A Dream - Act III" by Denis Florence MacCarthy
In spite of these caveats, the approach of using reduced muzzleloader charges compares quite favorably with the alternative of using unrifled pneumatic devices [WWZ04, MTY07], which are usually unrifled and unable to fire bullets which maintaining proper orientation in flight.