Swampman,
I put a rear peep on both my Pumas. I have a .357 and .454. I am too old to see barrel mounted sights. Both mine worked without changing the front bead. I think both of them had to be drilled an tapped but the newer ones may come like that. Both are very accurate at 100 yds. I bought the Williams from Midway for the 92. It was about $40. They have a more expensive version for about $20 more but these are fine on these rifles. Look 'em up!
Good Luck,
BT53