Bullpup Saiga Shotgun Posted August 29, 2008 in Shotguns by Steve Johnson with 12 CommentsTags: 20 guage, bullpup, Saiga, shotgun, shotguns CenterFire Systems sell a Bullpup stock kit for AKs: The AK-47 Bullpup Stock has an overall length of 27″ and weighs 7 lbs. when installed on a rifle Chibajoe at saiga-12.com installed it on his 20 gauge Saiga Shotgun. Click to expand. Very cool. Win the new Springfield Armory XD-9 Mod.2 TFB's first ever gun giveaway.