Mini 30 muzzlebrake

Can somebody tell me the proper way to install a muzzlebrake. I got a John Masen muzzlebrake from Midway for my Mini 30 and tried to put it on. It came with no instructions. Just by looking at it I thought I'd first have to remove the pin from the front sight then simply slip on the muzzlebrake over it and replace the pin with the longer one. But it seems like it doesn't fit. I can't get it over the front sight. Is it supposed to be really tight. Do I have to take a rubber mallet to it to get on all the way. Or did they send me the wrong muzzlebrake. The small zip lock pouch it came in says Mini 30 muzzlebrake. Please help.

Thanks. Bill S.