mauser offered it as a option on their sporting rifles. i was going to try to build my own but i never could find any pic's of one to use for ideas.
i found a guild rifle on aa that had one but its slightly different from the factory mauser built tang peeps. the mauser built peeps were spring loaded to stay
up & would retract into the pistol grip when the bolt was pulled back & come back up when the bolt was closed, the sight could be locked in the down
position when not being used. this one does not spring back up after the bolt is closed, its spring loaded to either stay all the way up or all the way down.
it's adjustable for windage & elevation by two dovetails in the head of the peep, they are hard to see in the photos.
pic of it folded down
side veiw
view from the back
i'll get some more pic's of the gun up in the next few days, its a small ring 98 guild rifle with double set triggers, claw mounts & a ribbed
barrel in 9x57

