Oddball gadget, for Our Brit Shooters

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   Does anyone here remember a little gadget that was (I believe) match legal for "Fullbore" Shooting back in the late 60's early 70's.
I believe it was called the "Peri-prism" or something similar. Possibly an Aldis product from the name.

Basically it was a periscope about 2~2 /12" long that you screwed into the eyepiece of your match rear-sight & then screwed the removed eyepiece into on the other end.

I don't remember if it was actually a front-silvered solid prism or a pair of front-silvered mirrors, but it formed a periscope that allowed left eye, right hand cross dominant shooters & maybe the opposite, although that woiuld be much rarer, to shot cross dominant by letting the left eye "see through" it allowing the cross dominant shooter to fire the rifle right handed & left eyed.

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Shamu Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Logo Designer / Donating Member Joined: April 25 2007 Location: MD, USA. Status: Offline Points: 20510	Post Options Post Reply Quote Shamu Report Post Thanks(0) Quote Reply Topic: Oddball gadget, for Our Brit Shooters Posted: October 30 2025 at 3:12pm
	Does anyone here remember a little gadget that was (I believe) match legal for "Fullbore" Shooting back in the late 60's early 70's. I believe it was called the "Peri-prism" or something similar. Possibly an Aldis product from the name. Basically it was a periscope about 2~2 /12" long that you screwed into the eyepiece of your match rear-sight & then screwed the removed eyepiece into on the other end. I don't remember if it was actually a front-silvered solid prism or a pair of front-silvered mirrors, but it formed a periscope that allowed left eye, right hand cross dominant shooters & maybe the opposite, although that woiuld be much rarer, to shot cross dominant by letting the left eye "see through" it allowing the cross dominant shooter to fire the rifle right handed & left eyed.
	Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)

Bear43 Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: August 11 2010 Location: Doland, SD Status: Offline Points: 3500	Post Options Post Reply Quote Bear43 Report Post Thanks(0) Quote Reply Posted: October 30 2025 at 4:42pm
	I could make use of such a device. I'm right handed, left eye dominant and my right eye is getting pretty bad anymore. Never knew such a thing existed.

A square 10 Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: December 12 2006 Location: MN , USA Status: Offline Points: 16997	Post Options Post Reply Quote A square 10 Report Post Thanks(0) Quote Reply Posted: October 30 2025 at 5:32pm
	never heard of it before

Sapper740 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: July 15 2021 Location: Texas Status: Offline Points: 1737	Post Options Post Reply Quote Sapper740 Report Post Thanks(0) Quote Reply Posted: October 31 2025 at 3:59am
	I'd drop a bunch of money to get such a thing being left-eyed and right handed.