Newly aquired 5.7MMJ carbine

[Dave Buenting 0]

   My first post, hope to get some answers. Carbine we just got is built on a Winchester platform with a few parts only Winchester. Have been trying to ID mfg of barrel, not that it makes a big difference but would be nice. Barrel is blued, not parked, front sight is military. Only stampings on barrel is what appears to be a number '9' just in front of receiver on the top of barrel. Is there a listing of all who have made these barrels and hopefully pics of them. 

Edited December 9, 2017 by Dave Buenting
update

[Ed Johnson 0]

.Dave, E-mail me at: edwardrjohnson610@gmail.com ASAP and I'll bring you up to speed. It looks like you might have picked up one of our conversions from the 1960's. There are some particulars you should be made aware of.  Ed J