ORIGINAL: thumper50
Try RMC Sports 1-800-338-4391 They are in Mingoville, Pa They have a V-peep that will fit your Firestorm. Good luck with your rifle.
V-peep looks like this. I use it on my TC Hawken FL because I am far sighted. I think you have to go to a smaller front sight to get a better 100 yard target. Effective range on 50 cal PRB is about 75 yards according to energy rules of 800 fpe. Chap Gleason
