Explanatory notes
… include : (1) Parts for military weapons , e.g., liners (tubes for barrels), recoil mechanisms and breeches for guns … tripods and other special mountings for guns, machine‑guns, sub‑machine‑guns, etc., whether or not with aiming and … , for butts, sights, barrels or breeches. (4) Morris tubes, etc . (small bore tubes for insertion in heavier …