Board Thread:General Nerf discussion/@comment-33092097-20190629184820/@comment-26431461-20190702182615

Ok so the theory is from the Reddit thread (this is why I need to read the entire conversation) that Rskm posted. The theory claimed that the SlingFire, Doublestrike, Hammershot and SledgeFire were originally supposed to be part of a cowboy series but they scrapped the cowboy series and merged them into the Zombie Strike line.

It sorta makes sense, especially if you read the comments where a bunch of people chipped in some more supporting points to back up this claim.