Lawsuits against both Promag AND PT...got the info from this thread: http://smith-wessonforum.com/smith-wesson-m-p-15-22/314265-pro-mag-discontinuing-15-22-a.html
Smith & Wesson v. Brookshire Tool and Manufacturing Company
Smith & Wesson v. Plinker Arms
Smith & Wesson v. Brookshire Tool and Manufacturing Company
Smith & Wesson v. Plinker Arms