Complex sentence: All have short barrels and originally fired the 5.75 mm (.22 calibre) Velo-dog cartridge, although many of the Velo-Dogs produced after 1900 accepted.22 LR or.25 ACP rounds.
Split into simpler sentences: All have short barrels and originally fired the 5.75 mm (.22 calibre) Velo-dog cartridge. Many of the Velo-Dogs produced after 1900 were accepted.22 LR or.25 ACP rounds.