At the range yesterday I met a guy who builds saiga12s. He does bang up work. He has been converting saigas for a long time. Wont mention any specific companies on tv shows, but long before those guys.
He really knew his stuff and his workmanship was top notch. My favorite piece was a converted saiga 12 with hk sights. it was wonderful.
He also prototyped a slide fire type stock and you can see him using it on his website. runs 950rpm
He lives down the street from my mom
anything you guys need, or any help he is more than happy to help. he does this because he loves it, not to make money.