Mil-Spec Barrel Extension

grabcad

Hello, I would like to modify this file and make a milspec barrel extension. I do not have solidworks, only solidworks reader. I would really appreciate it if someone would auto-dimension this part and post a .slddrw and .pdf with the dimensions so that I can check them. Also, This part is currently missing the bolt locking lug cams. It would really help out if someone could add those in. I have the specs for them, please send me a message with your e-mail. I appreciate your help!