v-peep was made to get around rule of NO PEEPS IN PA HUNTING as said by others here.
i mounted my v-peep back in front of frrizzen or back as far as it can go towards you eye.i had gunsmith drill hole there and mount it.
v-peep works much better in that location than where original sights were.it works real good there.v-peep does let more light in than a peep sight towards dark.
now, here is the bad things about v-peep, you cant add a insert to site as you can with peep sight BUT it is fine for hunting and shooting target way it is.also v-peep is not a click type of adjustment like the peep sights,you loosen a screw and move it, no problem.
i hate the peep sights that mount back real close to eye on wood,the v-peep looks real nice in front of frizzen,makes gun look like a gun not those peeps back by the tang area.
take v-peep and set in back as far as you can which will be most likely next to frizzen,just sit it there and look down your barrel, i think you will be very happy .
ps, mine is on T/C HAWKINS .50 CAL FLINTLOCK