Bill,
I also have a Mini-30 and got a Masen BW Brake for it. Mine fit very tight - in fact, I didn't need the longer pin. I just banged it on with a 2x4.
In retrospect, and looking closely at how it ended up, I would have been better off taking my Dremel to it, and removing a little material where it was binding up: the split where it wraps around the sight. As it is, it would probably take a wheel puller to get mine off now.
I also have a Mini-30 and got a Masen BW Brake for it. Mine fit very tight - in fact, I didn't need the longer pin. I just banged it on with a 2x4.
In retrospect, and looking closely at how it ended up, I would have been better off taking my Dremel to it, and removing a little material where it was binding up: the split where it wraps around the sight. As it is, it would probably take a wheel puller to get mine off now.