I did use those Dave. I change all my vents to RMCs on all my flinters. I no longer have that GPR. I sold it to someone and even told them about the ignition trouble. But the rifle was just over a year old and in perfect condition other than that. I haven't heard anything back so I guess he's pleased with it.

Gutshotem Lyman does make a peep (#57 I believe they call it) for the GPR. A goo solid tang sight. My rifle shot 80 gr of Goex FFg with a .530" RB and .018" pillow tick patch.